X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=isl_test.c;h=fb6a5f442c4355cd6242616074753aa0928344e7;hb=de51a9bc4da5dd3f1f9f57c2362da6f9752c44e0;hp=215c0144726de821fc1b92ea03b255d1cc9df4d5;hpb=95e32dbc5b66eff711d6122088ed29e67c239b87;p=platform%2Fupstream%2Fisl.git

diff --git a/isl_test.c b/isl_test.c
index 215c014..fb6a5f4 100644
--- a/isl_test.c
+++ b/isl_test.c
@@ -1,7 +1,7 @@
 /*
  * Copyright 2008-2009 Katholieke Universiteit Leuven
  *
- * Use of this software is governed by the GNU LGPLv2.1 license
+ * Use of this software is governed by the MIT license
  *
  * Written by Sven Verdoolaege, K.U.Leuven, Departement
  * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
@@ -12,7 +12,7 @@
 #include <limits.h>
 #include <isl_ctx_private.h>
 #include <isl_map_private.h>
-#include <isl/aff.h>
+#include <isl_aff_private.h>
 #include <isl/set.h>
 #include <isl/flow.h>
 #include <isl/constraint.h>
@@ -21,6 +21,10 @@
 #include <isl_factorization.h>
 #include <isl/schedule.h>
 #include <isl_options_private.h>
+#include <isl/vertices.h>
+#include <isl/ast_build.h>
+
+#define ARRAY_SIZE(array) (sizeof(array)/sizeof(*array))
 
 static char *srcdir;
 
@@ -50,15 +54,24 @@ void test_parse_map(isl_ctx *ctx, const char *str)
 	isl_map_free(map);
 }
 
-void test_parse_map_equal(isl_ctx *ctx, const char *str, const char *str2)
+int test_parse_map_equal(isl_ctx *ctx, const char *str, const char *str2)
 {
 	isl_map *map, *map2;
+	int equal;
 
 	map = isl_map_read_from_str(ctx, str);
 	map2 = isl_map_read_from_str(ctx, str2);
-	assert(map && map2 && isl_map_is_equal(map, map2));
+	equal = isl_map_is_equal(map, map2);
 	isl_map_free(map);
 	isl_map_free(map2);
+
+	if (equal < 0)
+		return -1;
+	if (!equal)
+		isl_die(ctx, isl_error_unknown, "maps not equal",
+			return -1);
+
+	return 0;
 }
 
 void test_parse_pwqp(isl_ctx *ctx, const char *str)
@@ -79,7 +92,7 @@ static void test_parse_pwaff(isl_ctx *ctx, const char *str)
 	isl_pw_aff_free(pwaff);
 }
 
-void test_parse(struct isl_ctx *ctx)
+int test_parse(struct isl_ctx *ctx)
 {
 	isl_map *map, *map2;
 	const char *str, *str2;
@@ -100,12 +113,16 @@ void test_parse(struct isl_ctx *ctx)
 
 	str = "{ [x,y]  : [([x/2]+y)/3] >= 1 }";
 	str2 = "{ [x, y] : 2y >= 6 - x }";
-	test_parse_map_equal(ctx, str, str2);
+	if (test_parse_map_equal(ctx, str, str2) < 0)
+		return -1;
 
-	test_parse_map_equal(ctx, "{ [x,y] : x <= min(y, 2*y+3) }",
-				  "{ [x,y] : x <= y, 2*y + 3 }");
+	if (test_parse_map_equal(ctx, "{ [x,y] : x <= min(y, 2*y+3) }",
+				      "{ [x,y] : x <= y, 2*y + 3 }") < 0)
+		return -1;
 	str = "{ [x, y] : (y <= x and y >= -3) or (2y <= -3 + x and y <= -4) }";
-	test_parse_map_equal(ctx, "{ [x,y] : x >= min(y, 2*y+3) }", str);
+	if (test_parse_map_equal(ctx, "{ [x,y] : x >= min(y, 2*y+3) }",
+					str) < 0)
+		return -1;
 
 	str = "{[new,old] -> [new+1-2*[(new+1)/2],old+1-2*[(old+1)/2]]}";
 	map = isl_map_read_from_str(ctx, str);
@@ -128,43 +145,67 @@ void test_parse(struct isl_ctx *ctx)
 
 	str = "[n] -> { [c1] : c1>=0 and c1<=floord(n-4,3) }";
 	str2 = "[n] -> { [c1] : c1 >= 0 and 3c1 <= -4 + n }";
-	test_parse_map_equal(ctx, str, str2);
+	if (test_parse_map_equal(ctx, str, str2) < 0)
+		return -1;
 
 	str = "{ [i,j] -> [i] : i < j; [i,j] -> [j] : j <= i }";
 	str2 = "{ [i,j] -> [min(i,j)] }";
-	test_parse_map_equal(ctx, str, str2);
+	if (test_parse_map_equal(ctx, str, str2) < 0)
+		return -1;
 
 	str = "{ [i,j] : i != j }";
 	str2 = "{ [i,j] : i < j or i > j }";
-	test_parse_map_equal(ctx, str, str2);
+	if (test_parse_map_equal(ctx, str, str2) < 0)
+		return -1;
 
 	str = "{ [i,j] : (i+1)*2 >= j }";
 	str2 = "{ [i, j] : j <= 2 + 2i }";
-	test_parse_map_equal(ctx, str, str2);
+	if (test_parse_map_equal(ctx, str, str2) < 0)
+		return -1;
 
 	str = "{ [i] -> [i > 0 ? 4 : 5] }";
 	str2 = "{ [i] -> [5] : i <= 0; [i] -> [4] : i >= 1 }";
-	test_parse_map_equal(ctx, str, str2);
+	if (test_parse_map_equal(ctx, str, str2) < 0)
+		return -1;
 
 	str = "[N=2,M] -> { [i=[(M+N)/4]] }";
 	str2 = "[N, M] -> { [i] : N = 2 and 4i <= 2 + M and 4i >= -1 + M }";
-	test_parse_map_equal(ctx, str, str2);
+	if (test_parse_map_equal(ctx, str, str2) < 0)
+		return -1;
 
 	str = "{ [x] : x >= 0 }";
 	str2 = "{ [x] : x-0 >= 0 }";
-	test_parse_map_equal(ctx, str, str2);
+	if (test_parse_map_equal(ctx, str, str2) < 0)
+		return -1;
 
 	str = "{ [i] : ((i > 10)) }";
 	str2 = "{ [i] : i >= 11 }";
-	test_parse_map_equal(ctx, str, str2);
+	if (test_parse_map_equal(ctx, str, str2) < 0)
+		return -1;
 
 	str = "{ [i] -> [0] }";
 	str2 = "{ [i] -> [0 * i] }";
-	test_parse_map_equal(ctx, str, str2);
+	if (test_parse_map_equal(ctx, str, str2) < 0)
+		return -1;
 
 	test_parse_pwqp(ctx, "{ [i] -> i + [ (i + [i/3])/2 ] }");
 	test_parse_map(ctx, "{ S1[i] -> [([i/10]),i%10] : 0 <= i <= 45 }");
 	test_parse_pwaff(ctx, "{ [i] -> [i + 1] : i > 0; [a] -> [a] : a < 0 }");
+	test_parse_pwqp(ctx, "{ [x] -> ([(x)/2] * [(x)/3]) }");
+
+	if (test_parse_map_equal(ctx, "{ [a] -> [b] : (not false) }",
+				      "{ [a] -> [b] : true }") < 0)
+		return -1;
+
+	if (test_parse_map_equal(ctx, "{ [i] : i/2 <= 5 }",
+				      "{ [i] : i <= 10 }") < 0)
+		return -1;
+
+	if (test_parse_map_equal(ctx, "{Sym=[n] [i] : i <= n }",
+				      "[n] -> { [i] : i <= n }") < 0)
+		return -1;
+
+	return 0;
 }
 
 void test_read(struct isl_ctx *ctx)
@@ -278,10 +319,14 @@ void test_dim(struct isl_ctx *ctx)
 	isl_map_free(map2);
 }
 
-void test_div(struct isl_ctx *ctx)
+static int test_div(isl_ctx *ctx)
 {
+	unsigned n;
+	const char *str;
+	int empty;
 	isl_int v;
 	isl_space *dim;
+	isl_set *set;
 	isl_local_space *ls;
 	struct isl_basic_set *bset;
 	struct isl_constraint *c;
@@ -574,6 +619,38 @@ void test_div(struct isl_ctx *ctx)
 	isl_basic_set_free(bset);
 
 	isl_int_clear(v);
+
+	str = "{ [i] : exists (e0, e1: 3e1 >= 1 + 2e0 and "
+	    "8e1 <= -1 + 5i - 5e0 and 2e1 >= 1 + 2i - 5e0) }";
+	set = isl_set_read_from_str(ctx, str);
+	set = isl_set_compute_divs(set);
+	isl_set_free(set);
+	if (!set)
+		return -1;
+
+	str = "{ [i,j] : 2*[i/2] + 3 * [j/4] <= 10 and 2 i = j }";
+	bset = isl_basic_set_read_from_str(ctx, str);
+	n = isl_basic_set_dim(bset, isl_dim_div);
+	isl_basic_set_free(bset);
+	if (!bset)
+		return -1;
+	if (n != 0)
+		isl_die(ctx, isl_error_unknown,
+			"expecting no existentials", return -1);
+
+	str = "{ [i,j,k] : 3 + i + 2j >= 0 and 2 * [(i+2j)/4] <= k }";
+	set = isl_set_read_from_str(ctx, str);
+	set = isl_set_remove_divs_involving_dims(set, isl_dim_set, 0, 2);
+	set = isl_set_fix_si(set, isl_dim_set, 2, -3);
+	empty = isl_set_is_empty(set);
+	isl_set_free(set);
+	if (empty < 0)
+		return -1;
+	if (!empty)
+		isl_die(ctx, isl_error_unknown,
+			"result not as accurate as expected", return -1);
+
+	return 0;
 }
 
 void test_application_case(struct isl_ctx *ctx, const char *name)
@@ -635,11 +712,30 @@ void test_affine_hull_case(struct isl_ctx *ctx, const char *name)
 	fclose(input);
 }
 
-void test_affine_hull(struct isl_ctx *ctx)
+int test_affine_hull(struct isl_ctx *ctx)
 {
+	const char *str;
+	isl_set *set;
+	isl_basic_set *bset;
+	int n;
+
 	test_affine_hull_case(ctx, "affine2");
 	test_affine_hull_case(ctx, "affine");
 	test_affine_hull_case(ctx, "affine3");
+
+	str = "[m] -> { [i0] : exists (e0, e1: e1 <= 1 + i0 and "
+			"m >= 3 and 4i0 <= 2 + m and e1 >= i0 and "
+			"e1 >= 0 and e1 <= 2 and e1 >= 1 + 2e0 and "
+			"2e1 <= 1 + m + 4e0 and 2e1 >= 2 - m + 4i0 - 4e0) }";
+	set = isl_set_read_from_str(ctx, str);
+	bset = isl_set_affine_hull(set);
+	n = isl_basic_set_dim(bset, isl_dim_div);
+	isl_basic_set_free(bset);
+	if (n != 0)
+		isl_die(ctx, isl_error_unknown, "not expecting any divs",
+			return -1);
+
+	return 0;
 }
 
 void test_convex_hull_case(struct isl_ctx *ctx, const char *name)
@@ -773,21 +869,65 @@ void test_gist(struct isl_ctx *ctx)
 	isl_basic_set_free(bset1);
 }
 
-void test_coalesce_set(isl_ctx *ctx, const char *str, int check_one)
+int test_coalesce_set(isl_ctx *ctx, const char *str, int check_one)
 {
 	isl_set *set, *set2;
+	int equal;
+	int one;
 
 	set = isl_set_read_from_str(ctx, str);
 	set = isl_set_coalesce(set);
 	set2 = isl_set_read_from_str(ctx, str);
-	assert(isl_set_is_equal(set, set2));
-	if (check_one)
-		assert(set && set->n == 1);
+	equal = isl_set_is_equal(set, set2);
+	one = set && set->n == 1;
 	isl_set_free(set);
 	isl_set_free(set2);
+
+	if (equal < 0)
+		return -1;
+	if (!equal)
+		isl_die(ctx, isl_error_unknown,
+			"coalesced set not equal to input", return -1);
+	if (check_one && !one)
+		isl_die(ctx, isl_error_unknown,
+			"coalesced set should not be a union", return -1);
+
+	return 0;
+}
+
+int test_coalesce_unbounded_wrapping(isl_ctx *ctx)
+{
+	int r = 0;
+	int bounded;
+
+	bounded = isl_options_get_coalesce_bounded_wrapping(ctx);
+	isl_options_set_coalesce_bounded_wrapping(ctx, 0);
+
+	if (test_coalesce_set(ctx,
+		"{[x,y,z] : y + 2 >= 0 and x - y + 1 >= 0 and "
+			"-x - y + 1 >= 0 and -3 <= z <= 3;"
+		"[x,y,z] : -x+z + 20 >= 0 and -x-z + 20 >= 0 and "
+			"x-z + 20 >= 0 and x+z + 20 >= 0 and "
+			"-10 <= y <= 0}", 1) < 0)
+		goto error;
+	if (test_coalesce_set(ctx,
+		"{[x,y] : 0 <= x,y <= 10; [5,y]: 4 <=y <= 11}", 1) < 0)
+		goto error;
+	if (test_coalesce_set(ctx,
+		"{[x,0,0] : -5 <= x <= 5; [0,y,1] : -5 <= y <= 5 }", 1) < 0)
+		goto error;
+
+	if (0) {
+error:
+		r = -1;
+	}
+
+	isl_options_set_coalesce_bounded_wrapping(ctx, bounded);
+
+	return r;
 }
 
-void test_coalesce(struct isl_ctx *ctx)
+int test_coalesce(struct isl_ctx *ctx)
 {
 	const char *str;
 	struct isl_set *set, *set2;
@@ -1015,23 +1155,50 @@ void test_coalesce(struct isl_ctx *ctx)
 	test_coalesce_set(ctx,
 		"{ [x, y] : (x >= 0 and y >= 0 and x <= 10 and y <= 10) or "
 		"(x >= 1 and y >= 1 and x <= 11 and y <= 11) }", 1);
-	test_coalesce_set(ctx,
-		"{[x,y,z] : y + 2 >= 0 and x - y + 1 >= 0 and "
-			"-x - y + 1 >= 0 and -3 <= z <= 3;"
-		"[x,y,z] : -x+z + 20 >= 0 and -x-z + 20 >= 0 and "
-			"x-z + 20 >= 0 and x+z + 20 >= 0 and -10 <= y <= 0}", 1);
-	test_coalesce_set(ctx,
-		"{[x,y] : 0 <= x,y <= 10; [5,y]: 4 <=y <= 11}", 1);
-	test_coalesce_set(ctx, "{[x,0] : x >= 0; [x,1] : x <= 20}", 0);
-	test_coalesce_set(ctx,
-		"{[x,0,0] : -5 <= x <= 5; [0,y,1] : -5 <= y <= 5 }", 1);
-	test_coalesce_set(ctx, "{ [x, 1 - x] : 0 <= x <= 1; [0,0] }", 1);
-	test_coalesce_set(ctx, "{ [0,0]; [i,i] : 1 <= i <= 10 }", 1);
-	test_coalesce_set(ctx, "{ [0,0]; [i,j] : 1 <= i,j <= 10 }", 0);
-	test_coalesce_set(ctx, "{ [0,0]; [i,2i] : 1 <= i <= 10 }", 1);
-	test_coalesce_set(ctx, "{ [0,0]; [i,2i] : 2 <= i <= 10 }", 0);
-	test_coalesce_set(ctx, "{ [1,0]; [i,2i] : 1 <= i <= 10 }", 0);
-	test_coalesce_set(ctx, "{ [0,1]; [i,2i] : 1 <= i <= 10 }", 0);
+	if (test_coalesce_unbounded_wrapping(ctx) < 0)
+		return -1;
+	if (test_coalesce_set(ctx, "{[x,0] : x >= 0; [x,1] : x <= 20}", 0) < 0)
+		return -1;
+	if (test_coalesce_set(ctx, "{ [x, 1 - x] : 0 <= x <= 1; [0,0] }", 1) < 0)
+		return -1;
+	if (test_coalesce_set(ctx, "{ [0,0]; [i,i] : 1 <= i <= 10 }", 1) < 0)
+		return -1;
+	if (test_coalesce_set(ctx, "{ [0,0]; [i,j] : 1 <= i,j <= 10 }", 0) < 0)
+		return -1;
+	if (test_coalesce_set(ctx, "{ [0,0]; [i,2i] : 1 <= i <= 10 }", 1) < 0)
+		return -1;
+	if (test_coalesce_set(ctx, "{ [0,0]; [i,2i] : 2 <= i <= 10 }", 0) < 0)
+		return -1;
+	if (test_coalesce_set(ctx, "{ [1,0]; [i,2i] : 1 <= i <= 10 }", 0) < 0)
+		return -1;
+	if (test_coalesce_set(ctx, "{ [0,1]; [i,2i] : 1 <= i <= 10 }", 0) < 0)
+		return -1;
+	if (test_coalesce_set(ctx, "{ [a, b] : exists e : 2e = a and "
+		    "a >= 0 and (a <= 3 or (b <= 0 and b >= -4 + a)) }", 0) < 0)
+		return -1;
+	if (test_coalesce_set(ctx,
+		"{ [i, j, i', j'] : i <= 2 and j <= 2 and "
+			"j' >= -1 + 2i + j - 2i' and i' <= -1 + i and "
+			"j >= 1 and j' <= i + j - i' and i >= 1; "
+		"[1, 1, 1, 1] }", 0) < 0)
+		return -1;
+	if (test_coalesce_set(ctx, "{ [i,j] : exists a,b : i = 2a and j = 3b; "
+				     "[i,j] : exists a : j = 3a }", 1) < 0)
+		return -1;
+	if (test_coalesce_set(ctx,
+		"{ [a, b, c] : (c <= 7 - b and b <= 1 and b >= 0 and "
+			"c >= 3 + b and b <= 3 + 8a and b >= -26 + 8a and "
+			"a >= 3) or "
+		    "(b <= 1 and c <= 7 and b >= 0 and c >= 4 + b and "
+			"b <= 3 + 8a and b >= -26 + 8a and a >= 3) }", 1) < 0)
+		return -1;
+	if (test_coalesce_set(ctx,
+		"{ [a, 0, c] : c >= 1 and c <= 29 and c >= -1 + 8a and "
+				"c <= 6 + 8a and a >= 3; "
+		    "[a, -1, c] : c >= 1 and c <= 30 and c >= 8a and "
+				"c <= 7 + 8a and a >= 3 and a <= 4 }", 1) < 0)
+		return -1;
+	return 0;
 }
 
 void test_closure(struct isl_ctx *ctx)
@@ -1367,6 +1534,20 @@ void test_lexmin(struct isl_ctx *ctx)
 	assert(isl_map_is_equal(map, map2));
 	isl_map_free(map);
 	isl_map_free(map2);
+
+	/* Check that empty pieces are properly combined. */
+	str = "[K, N] -> { [x, y] -> [a, b] : K+2<=N<=K+4 and x>=4 and "
+		"2N-6<=x<K+N and N-1<=a<=K+N-1 and N+b-6<=a<=2N-4 and "
+		"b<=2N-3K+a and 3b<=4N-K+1 and b>=N and a>=x+1 }";
+	map = isl_map_read_from_str(ctx, str);
+	map = isl_map_lexmin(map);
+	str = "[K, N] -> { [x, y] -> [1 + x, N] : x >= -6 + 2N and "
+		"x <= -5 + 2N and x >= -1 + 3K - N and x <= -2 + K + N and "
+		"x >= 4 }";
+	map2 = isl_map_read_from_str(ctx, str);
+	assert(isl_map_is_equal(map, map2));
+	isl_map_free(map);
+	isl_map_free(map2);
 }
 
 struct must_may {
@@ -1408,6 +1589,19 @@ static int map_is_equal(__isl_keep isl_map *map, const char *str)
 	return equal;
 }
 
+static int map_check_equal(__isl_keep isl_map *map, const char *str)
+{
+	int equal;
+
+	equal = map_is_equal(map, str);
+	if (equal < 0)
+		return -1;
+	if (!equal)
+		isl_die(isl_map_get_ctx(map), isl_error_unknown,
+			"result not as expected", return -1);
+	return 0;
+}
+
 void test_dep(struct isl_ctx *ctx)
 {
 	const char *str;
@@ -1848,23 +2042,92 @@ void test_lift(isl_ctx *ctx)
 	isl_basic_set_free(bset);
 }
 
-void test_subset(isl_ctx *ctx)
+struct {
+	const char *set1;
+	const char *set2;
+	int subset;
+} subset_tests[] = {
+	{ "{ [112, 0] }",
+	  "{ [i0, i1] : exists (e0 = [(i0 - i1)/16], e1: "
+		"16e0 <= i0 - i1 and 16e0 >= -15 + i0 - i1 and "
+		"16e1 <= i1 and 16e0 >= -i1 and 16e1 >= -i0 + i1) }", 1 },
+	{ "{ [65] }",
+	  "{ [i] : exists (e0 = [(255i)/256], e1 = [(127i + 65e0)/191], "
+		"e2 = [(3i + 61e1)/65], e3 = [(52i + 12e2)/61], "
+		"e4 = [(2i + e3)/3], e5 = [(4i + e3)/4], e6 = [(8i + e3)/12]: "
+		    "3e4 = 2i + e3 and 4e5 = 4i + e3 and 12e6 = 8i + e3 and "
+		    "i <= 255 and 64e3 >= -45 + 67i and i >= 0 and "
+		    "256e0 <= 255i and 256e0 >= -255 + 255i and "
+		    "191e1 <= 127i + 65e0 and 191e1 >= -190 + 127i + 65e0 and "
+		    "65e2 <= 3i + 61e1 and 65e2 >= -64 + 3i + 61e1 and "
+		    "61e3 <= 52i + 12e2 and 61e3 >= -60 + 52i + 12e2) }", 1 },
+	{ "{ [i] : 0 <= i <= 10 }", "{ rat: [i] : 0 <= i <= 10 }", 1 },
+	{ "{ rat: [i] : 0 <= i <= 10 }", "{ [i] : 0 <= i <= 10 }", 0 },
+	{ "{ rat: [0] }", "{ [i] : 0 <= i <= 10 }", 1 },
+	{ "{ rat: [(1)/2] }", "{ [i] : 0 <= i <= 10 }", 0 },
+};
+
+static int test_subset(isl_ctx *ctx)
 {
-	const char *str;
+	int i;
 	isl_set *set1, *set2;
+	int subset;
+
+	for (i = 0; i < ARRAY_SIZE(subset_tests); ++i) {
+		set1 = isl_set_read_from_str(ctx, subset_tests[i].set1);
+		set2 = isl_set_read_from_str(ctx, subset_tests[i].set2);
+		subset = isl_set_is_subset(set1, set2);
+		isl_set_free(set1);
+		isl_set_free(set2);
+		if (subset < 0)
+			return -1;
+		if (subset != subset_tests[i].subset)
+			isl_die(ctx, isl_error_unknown,
+				"incorrect subset result", return -1);
+	}
 
-	str = "{ [112, 0] }";
-	set1 = isl_set_read_from_str(ctx, str);
-	str = "{ [i0, i1] : exists (e0 = [(i0 - i1)/16], e1: "
-		"16e0 <= i0 - i1 and 16e0 >= -15 + i0 - i1 and "
-		"16e1 <= i1 and 16e0 >= -i1 and 16e1 >= -i0 + i1) }";
-	set2 = isl_set_read_from_str(ctx, str);
-	assert(isl_set_is_subset(set1, set2));
-	isl_set_free(set1);
-	isl_set_free(set2);
+	return 0;
+}
+
+struct {
+	const char *minuend;
+	const char *subtrahend;
+	const char *difference;
+} subtract_domain_tests[] = {
+	{ "{ A[i] -> B[i] }", "{ A[i] }", "{ }" },
+	{ "{ A[i] -> B[i] }", "{ B[i] }", "{ A[i] -> B[i] }" },
+	{ "{ A[i] -> B[i] }", "{ A[i] : i > 0 }", "{ A[i] -> B[i] : i <= 0 }" },
+};
+
+static int test_subtract(isl_ctx *ctx)
+{
+	int i;
+	isl_union_map *umap1, *umap2;
+	isl_union_set *uset;
+	int equal;
+
+	for (i = 0; i < ARRAY_SIZE(subtract_domain_tests); ++i) {
+		umap1 = isl_union_map_read_from_str(ctx,
+				subtract_domain_tests[i].minuend);
+		uset = isl_union_set_read_from_str(ctx,
+				subtract_domain_tests[i].subtrahend);
+		umap2 = isl_union_map_read_from_str(ctx,
+				subtract_domain_tests[i].difference);
+		umap1 = isl_union_map_subtract_domain(umap1, uset);
+		equal = isl_union_map_is_equal(umap1, umap2);
+		isl_union_map_free(umap1);
+		isl_union_map_free(umap2);
+		if (equal < 0)
+			return -1;
+		if (!equal)
+			isl_die(ctx, isl_error_unknown,
+				"incorrect subtract domain result", return -1);
+	}
+
+	return 0;
 }
 
-void test_factorize(isl_ctx *ctx)
+int test_factorize(isl_ctx *ctx)
 {
 	const char *str;
 	isl_basic_set *bset;
@@ -1879,9 +2142,11 @@ void test_factorize(isl_ctx *ctx)
 	    "3i5 >= -2i0 - i2 + 3i4 }";
 	bset = isl_basic_set_read_from_str(ctx, str);
 	f = isl_basic_set_factorizer(bset);
-	assert(f);
 	isl_basic_set_free(bset);
 	isl_factorizer_free(f);
+	if (!f)
+		isl_die(ctx, isl_error_unknown,
+			"failed to construct factorizer", return -1);
 
 	str = "{ [i0, i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12] : "
 	    "i12 <= 2 + i0 - i11 and 2i8 >= -i4 and i11 >= i1 and "
@@ -1895,9 +2160,13 @@ void test_factorize(isl_ctx *ctx)
 	    "9i6 <= 5 - i2 + 6i3 and i12 <= -1 and i2 <= 0 }";
 	bset = isl_basic_set_read_from_str(ctx, str);
 	f = isl_basic_set_factorizer(bset);
-	assert(f);
 	isl_basic_set_free(bset);
 	isl_factorizer_free(f);
+	if (!f)
+		isl_die(ctx, isl_error_unknown,
+			"failed to construct factorizer", return -1);
+
+	return 0;
 }
 
 static int check_injective(__isl_take isl_map *map, void *user)
@@ -2036,23 +2305,48 @@ int test_one_schedule(isl_ctx *ctx, const char *d, const char *w,
 	return 0;
 }
 
-int test_special_schedule(isl_ctx *ctx, const char *domain,
-	const char *validity, const char *proximity, const char *expected_sched)
+static __isl_give isl_union_map *compute_schedule(isl_ctx *ctx,
+	const char *domain, const char *validity, const char *proximity)
 {
 	isl_union_set *dom;
 	isl_union_map *dep;
 	isl_union_map *prox;
-	isl_union_map *sched1, *sched2;
 	isl_schedule *schedule;
-	int equal;
+	isl_union_map *sched;
 
 	dom = isl_union_set_read_from_str(ctx, domain);
 	dep = isl_union_map_read_from_str(ctx, validity);
 	prox = isl_union_map_read_from_str(ctx, proximity);
 	schedule = isl_union_set_compute_schedule(dom, dep, prox);
-	sched1 = isl_schedule_get_map(schedule);
+	sched = isl_schedule_get_map(schedule);
 	isl_schedule_free(schedule);
 
+	return sched;
+}
+
+/* Check that a schedule can be constructed on the given domain
+ * with the given validity and proximity constraints.
+ */
+static int test_has_schedule(isl_ctx *ctx, const char *domain,
+	const char *validity, const char *proximity)
+{
+	isl_union_map *sched;
+
+	sched = compute_schedule(ctx, domain, validity, proximity);
+	if (!sched)
+		return -1;
+
+	isl_union_map_free(sched);
+	return 0;
+}
+
+int test_special_schedule(isl_ctx *ctx, const char *domain,
+	const char *validity, const char *proximity, const char *expected_sched)
+{
+	isl_union_map *sched1, *sched2;
+	int equal;
+
+	sched1 = compute_schedule(ctx, domain, validity, proximity);
 	sched2 = isl_union_map_read_from_str(ctx, expected_sched);
 
 	equal = isl_union_map_is_equal(sched1, sched2);
@@ -2068,10 +2362,51 @@ int test_special_schedule(isl_ctx *ctx, const char *domain,
 	return 0;
 }
 
+/* Check that the schedule map is properly padded, even after being
+ * reconstructed from the band forest.
+ */
+static int test_padded_schedule(isl_ctx *ctx)
+{
+	const char *str;
+	isl_union_set *D;
+	isl_union_map *validity, *proximity;
+	isl_schedule *sched;
+	isl_union_map *map1, *map2;
+	isl_band_list *list;
+	int equal;
+
+	str = "[N] -> { S0[i] : 0 <= i <= N; S1[i, j] : 0 <= i, j <= N }";
+	D = isl_union_set_read_from_str(ctx, str);
+	validity = isl_union_map_empty(isl_union_set_get_space(D));
+	proximity = isl_union_map_copy(validity);
+	sched = isl_union_set_compute_schedule(D, validity, proximity);
+	map1 = isl_schedule_get_map(sched);
+	list = isl_schedule_get_band_forest(sched);
+	isl_band_list_free(list);
+	map2 = isl_schedule_get_map(sched);
+	isl_schedule_free(sched);
+	equal = isl_union_map_is_equal(map1, map2);
+	isl_union_map_free(map1);
+	isl_union_map_free(map2);
+
+	if (equal < 0)
+		return -1;
+	if (!equal)
+		isl_die(ctx, isl_error_unknown,
+			"reconstructed schedule map not the same as original",
+			return -1);
+
+	return 0;
+}
+
 int test_schedule(isl_ctx *ctx)
 {
 	const char *D, *W, *R, *V, *P, *S;
 
+	/* Handle resulting schedule with zero bands. */
+	if (test_one_schedule(ctx, "{[]}", "{}", "{}", "{[] -> []}", 0, 0) < 0)
+		return -1;
+
 	/* Jacobi */
 	D = "[T,N] -> { S1[t,i] : 1 <= t <= T and 2 <= i <= N - 1 }";
 	W = "{ S1[t,i] -> a[t,i] }";
@@ -2237,6 +2572,49 @@ int test_schedule(isl_ctx *ctx)
 		return -1;
 	ctx->opt->schedule_outer_zero_distance = 0;
 
+	D = "{Stmt_for_body24[i0, i1, i2, i3]:"
+		"i0 >= 0 and i0 <= 1 and i1 >= 0 and i1 <= 6 and i2 >= 2 and "
+		"i2 <= 6 - i1 and i3 >= 0 and i3 <= -1 + i2;"
+	     "Stmt_for_body24[i0, i1, 1, 0]:"
+		"i0 >= 0 and i0 <= 1 and i1 >= 0 and i1 <= 5;"
+	     "Stmt_for_body7[i0, i1, i2]:"
+		"i0 >= 0 and i0 <= 1 and i1 >= 0 and i1 <= 7 and i2 >= 0 and "
+		"i2 <= 7 }";
+
+	V = "{Stmt_for_body24[0, i1, i2, i3] -> "
+		"Stmt_for_body24[1, i1, i2, i3]:"
+		"i3 >= 0 and i3 <= -1 + i2 and i1 >= 0 and i2 <= 6 - i1 and "
+		"i2 >= 1;"
+	     "Stmt_for_body24[0, i1, i2, i3] -> "
+		"Stmt_for_body7[1, 1 + i1 + i3, 1 + i1 + i2]:"
+		"i3 <= -1 + i2 and i2 <= 6 - i1 and i2 >= 1 and i1 >= 0 and "
+		"i3 >= 0;"
+	      "Stmt_for_body24[0, i1, i2, i3] ->"
+		"Stmt_for_body7[1, i1, 1 + i1 + i3]:"
+		"i3 >= 0 and i2 <= 6 - i1 and i1 >= 0 and i3 <= -1 + i2;"
+	      "Stmt_for_body7[0, i1, i2] -> Stmt_for_body7[1, i1, i2]:"
+		"(i2 >= 1 + i1 and i2 <= 6 and i1 >= 0 and i1 <= 4) or "
+		"(i2 >= 3 and i2 <= 7 and i1 >= 1 and i2 >= 1 + i1) or "
+		"(i2 >= 0 and i2 <= i1 and i2 >= -7 + i1 and i1 <= 7);"
+	      "Stmt_for_body7[0, i1, 1 + i1] -> Stmt_for_body7[1, i1, 1 + i1]:"
+		"i1 <= 6 and i1 >= 0;"
+	      "Stmt_for_body7[0, 0, 7] -> Stmt_for_body7[1, 0, 7];"
+	      "Stmt_for_body7[i0, i1, i2] -> "
+		"Stmt_for_body24[i0, o1, -1 + i2 - o1, -1 + i1 - o1]:"
+		"i0 >= 0 and i0 <= 1 and o1 >= 0 and i2 >= 1 + i1 and "
+		"o1 <= -2 + i2 and i2 <= 7 and o1 <= -1 + i1;"
+	      "Stmt_for_body7[i0, i1, i2] -> "
+		"Stmt_for_body24[i0, i1, o2, -1 - i1 + i2]:"
+		"i0 >= 0 and i0 <= 1 and i1 >= 0 and o2 >= -i1 + i2 and "
+		"o2 >= 1 and o2 <= 6 - i1 and i2 >= 1 + i1 }";
+	P = V;
+	S = "{ Stmt_for_body24[i0, i1, i2, i3] -> "
+		"[i0, 5i0 + i1, 6i0 + i1 + i2, 1 + 6i0 + i1 + i2 + i3, 1];"
+	    "Stmt_for_body7[i0, i1, i2] -> [0, 5i0, 6i0 + i1, 6i0 + i2, 0] }";
+
+	if (test_special_schedule(ctx, D, V, P, S) < 0)
+		return -1;
+
 	D = "{ S_0[i, j] : i >= 1 and i <= 10 and j >= 1 and j <= 8 }";
 	V = "{ S_0[i, j] -> S_0[i, 1 + j] : i >= 1 and i <= 10 and "
 					   "j >= 1 and j <= 7;"
@@ -2272,7 +2650,33 @@ int test_schedule(isl_ctx *ctx)
 	if (test_special_schedule(ctx, D, V, P, S) < 0)
 		return -1;
 	ctx->opt->schedule_algorithm = ISL_SCHEDULE_ALGORITHM_ISL;
-	return test_special_schedule(ctx, D, V, P, S);
+	if (test_special_schedule(ctx, D, V, P, S) < 0)
+		return -1;
+	
+	D = "{ A[a]; B[] }";
+	V = "{}";
+	P = "{ A[a] -> B[] }";
+	if (test_has_schedule(ctx, D, V, P) < 0)
+		return -1;
+
+	if (test_padded_schedule(ctx) < 0)
+		return -1;
+
+	/* Check that check for progress is not confused by rational
+	 * solution.
+	 */
+	D = "[N] -> { S0[i, j] : i >= 0 and i <= N and j >= 0 and j <= N }";
+	V = "[N] -> { S0[i0, -1 + N] -> S0[2 + i0, 0] : i0 >= 0 and "
+							"i0 <= -2 + N; "
+			"S0[i0, i1] -> S0[i0, 1 + i1] : i0 >= 0 and "
+				"i0 <= N and i1 >= 0 and i1 <= -1 + N }";
+	P = "{}";
+	ctx->opt->schedule_algorithm = ISL_SCHEDULE_ALGORITHM_FEAUTRIER;
+	if (test_has_schedule(ctx, D, V, P) < 0)
+		return -1;
+	ctx->opt->schedule_algorithm = ISL_SCHEDULE_ALGORITHM_ISL;
+
+	return 0;
 }
 
 int test_plain_injective(isl_ctx *ctx, const char *str, int injective)
@@ -2326,17 +2730,45 @@ int test_injective(isl_ctx *ctx)
 	return 0;
 }
 
+static int aff_plain_is_equal(__isl_keep isl_aff *aff, const char *str)
+{
+	isl_aff *aff2;
+	int equal;
+
+	if (!aff)
+		return -1;
+
+	aff2 = isl_aff_read_from_str(isl_aff_get_ctx(aff), str);
+	equal = isl_aff_plain_is_equal(aff, aff2);
+	isl_aff_free(aff2);
+
+	return equal;
+}
+
+static int aff_check_plain_equal(__isl_keep isl_aff *aff, const char *str)
+{
+	int equal;
+
+	equal = aff_plain_is_equal(aff, str);
+	if (equal < 0)
+		return -1;
+	if (!equal)
+		isl_die(isl_aff_get_ctx(aff), isl_error_unknown,
+			"result not as expected", return -1);
+	return 0;
+}
+
 int test_aff(isl_ctx *ctx)
 {
 	const char *str;
 	isl_set *set;
-	isl_space *dim;
+	isl_space *space;
 	isl_local_space *ls;
 	isl_aff *aff;
-	int zero;
+	int zero, equal;
 
-	dim = isl_space_set_alloc(ctx, 0, 1);
-	ls = isl_local_space_from_space(dim);
+	space = isl_space_set_alloc(ctx, 0, 1);
+	ls = isl_local_space_from_space(space);
 	aff = isl_aff_zero_on_domain(ls);
 
 	aff = isl_aff_add_coefficient_si(aff, isl_dim_in, 0, 1);
@@ -2360,6 +2792,14 @@ int test_aff(isl_ctx *ctx)
 	if (!zero)
 		isl_die(ctx, isl_error_unknown, "unexpected result", return -1);
 
+	aff = isl_aff_read_from_str(ctx, "{ [-1] }");
+	aff = isl_aff_scale_down_ui(aff, 64);
+	aff = isl_aff_floor(aff);
+	equal = aff_check_plain_equal(aff, "{ [-1] }");
+	isl_aff_free(aff);
+	if (equal < 0)
+		return -1;
+
 	return 0;
 }
 
@@ -2443,6 +2883,24 @@ int test_dim_max(isl_ctx *ctx)
 	if (!equal)
 		isl_die(ctx, isl_error_unknown, "unexpected result", return -1);
 
+	/* Check that solutions are properly merged. */
+	str = "[n] -> { [a, b, c] : c >= -4a - 2b and "
+				"c <= -1 + n - 4a - 2b and c >= -2b and "
+				"4a >= -4 + n and c >= 0 }";
+	set = isl_set_read_from_str(ctx, str);
+	pwaff = isl_set_dim_min(set, 2);
+	set1 = isl_set_from_pw_aff(pwaff);
+	str = "[n] -> { [(0)] : n >= 1 }";
+	set2 = isl_set_read_from_str(ctx, str);
+	equal = isl_set_is_equal(set1, set2);
+	isl_set_free(set1);
+	isl_set_free(set2);
+
+	if (equal < 0)
+		return -1;
+	if (!equal)
+		isl_die(ctx, isl_error_unknown, "unexpected result", return -1);
+
 	return 0;
 }
 
@@ -2450,6 +2908,7 @@ int test_product(isl_ctx *ctx)
 {
 	const char *str;
 	isl_set *set;
+	isl_union_set *uset1, *uset2;
 	int ok;
 
 	str = "{ A[i] }";
@@ -2462,6 +2921,19 @@ int test_product(isl_ctx *ctx)
 	if (!ok)
 		isl_die(ctx, isl_error_unknown, "unexpected result", return -1);
 
+	str = "{ [] }";
+	uset1 = isl_union_set_read_from_str(ctx, str);
+	uset1 = isl_union_set_product(uset1, isl_union_set_copy(uset1));
+	str = "{ [[] -> []] }";
+	uset2 = isl_union_set_read_from_str(ctx, str);
+	ok = isl_union_set_is_equal(uset1, uset2);
+	isl_union_set_free(uset1);
+	isl_union_set_free(uset2);
+	if (ok < 0)
+		return -1;
+	if (!ok)
+		isl_die(ctx, isl_error_unknown, "unexpected result", return -1);
+
 	return 0;
 }
 
@@ -2530,7 +3002,32 @@ int test_fixed(isl_ctx *ctx)
 	return 0;
 }
 
-int test_union_pw(isl_ctx *ctx)
+int test_vertices(isl_ctx *ctx)
+{
+	const char *str;
+	isl_basic_set *bset;
+	isl_vertices *vertices;
+
+	str = "{ A[t, i] : t = 12 and i >= 4 and i <= 12 }";
+	bset = isl_basic_set_read_from_str(ctx, str);
+	vertices = isl_basic_set_compute_vertices(bset);
+	isl_basic_set_free(bset);
+	isl_vertices_free(vertices);
+	if (!vertices)
+		return -1;
+
+	str = "{ A[t, i] : t = 14 and i = 1 }";
+	bset = isl_basic_set_read_from_str(ctx, str);
+	vertices = isl_basic_set_compute_vertices(bset);
+	isl_basic_set_free(bset);
+	isl_vertices_free(vertices);
+	if (!vertices)
+		return -1;
+
+	return 0;
+}
+
+int test_union_pw(isl_ctx *ctx)
 {
 	int equal;
 	const char *str;
@@ -2554,53 +3051,984 @@ int test_union_pw(isl_ctx *ctx)
 	return 0;
 }
 
+int test_output(isl_ctx *ctx)
+{
+	char *s;
+	const char *str;
+	isl_pw_aff *pa;
+	isl_printer *p;
+	int equal;
+
+	str = "[x] -> { [1] : x % 4 <= 2; [2] : x = 3 }";
+	pa = isl_pw_aff_read_from_str(ctx, str);
+
+	p = isl_printer_to_str(ctx);
+	p = isl_printer_set_output_format(p, ISL_FORMAT_C);
+	p = isl_printer_print_pw_aff(p, pa);
+	s = isl_printer_get_str(p);
+	isl_printer_free(p);
+	isl_pw_aff_free(pa);
+	if (!s)
+		equal = -1;
+	else
+		equal = !strcmp(s, "(2 - x + 4*floord(x, 4) >= 0) ? (1) : 2");
+	free(s);
+	if (equal < 0)
+		return -1;
+	if (!equal)
+		isl_die(ctx, isl_error_unknown, "unexpected result", return -1);
+
+	return 0;
+}
+
+int test_sample(isl_ctx *ctx)
+{
+	const char *str;
+	isl_basic_set *bset1, *bset2;
+	int empty, subset;
+
+	str = "{ [a, b, c, d, e, f, g, h, i, j, k] : "
+	    "3i >= 1073741823b - c - 1073741823e + f and c >= 0 and "
+	    "3i >= -1 + 3221225466b + c + d - 3221225466e - f and "
+	    "2e >= a - b and 3e <= 2a and 3k <= -a and f <= -1 + a and "
+	    "3i <= 4 - a + 4b + 2c - e - 2f and 3k <= -a + c - f and "
+	    "3h >= -2 + a and 3g >= -3 - a and 3k >= -2 - a and "
+	    "3i >= -2 - a - 2c + 3e + 2f and 3h <= a + c - f and "
+	    "3h >= a + 2147483646b + 2c - 2147483646e - 2f and "
+	    "3g <= -1 - a and 3i <= 1 + c + d - f and a <= 1073741823 and "
+	    "f >= 1 - a + 1073741822b + c + d - 1073741822e and "
+	    "3i >= 1 + 2b - 2c + e + 2f + 3g and "
+	    "1073741822f <= 1073741822 - a + 1073741821b + 1073741822c +"
+		"d - 1073741821e and "
+	    "3j <= 3 - a + 3b and 3g <= -2 - 2b + c + d - e - f and "
+	    "3j >= 1 - a + b + 2e and "
+	    "3f >= -3 + a + 3221225462b + 3c + d - 3221225465e and "
+	    "3i <= 4 - a + 4b - e and "
+	    "f <= 1073741822 + 1073741822b - 1073741822e and 3h <= a and "
+	    "f >= 0 and 2e <= 4 - a + 5b - d and 2e <= a - b + d and "
+	    "c <= -1 + a and 3i >= -2 - a + 3e and "
+	    "1073741822e <= 1073741823 - a + 1073741822b + c and "
+	    "3g >= -4 + 3221225464b + 3c + d - 3221225467e - 3f and "
+	    "3i >= -1 + 3221225466b + 3c + d - 3221225466e - 3f and "
+	    "1073741823e >= 1 + 1073741823b - d and "
+	    "3i >= 1073741823b + c - 1073741823e - f and "
+	    "3i >= 1 + 2b + e + 3g }";
+	bset1 = isl_basic_set_read_from_str(ctx, str);
+	bset2 = isl_basic_set_sample(isl_basic_set_copy(bset1));
+	empty = isl_basic_set_is_empty(bset2);
+	subset = isl_basic_set_is_subset(bset2, bset1);
+	isl_basic_set_free(bset1);
+	isl_basic_set_free(bset2);
+	if (empty < 0 || subset < 0)
+		return -1;
+	if (empty)
+		isl_die(ctx, isl_error_unknown, "point not found", return -1);
+	if (!subset)
+		isl_die(ctx, isl_error_unknown, "bad point found", return -1);
+
+	return 0;
+}
+
+int test_fixed_power(isl_ctx *ctx)
+{
+	const char *str;
+	isl_map *map;
+	isl_int exp;
+	int equal;
+
+	isl_int_init(exp);
+	str = "{ [i] -> [i + 1] }";
+	map = isl_map_read_from_str(ctx, str);
+	isl_int_set_si(exp, 23);
+	map = isl_map_fixed_power(map, exp);
+	equal = map_check_equal(map, "{ [i] -> [i + 23] }");
+	isl_int_clear(exp);
+	isl_map_free(map);
+	if (equal < 0)
+		return -1;
+
+	return 0;
+}
+
+int test_slice(isl_ctx *ctx)
+{
+	const char *str;
+	isl_map *map;
+	int equal;
+
+	str = "{ [i] -> [j] }";
+	map = isl_map_read_from_str(ctx, str);
+	map = isl_map_equate(map, isl_dim_in, 0, isl_dim_out, 0);
+	equal = map_check_equal(map, "{ [i] -> [i] }");
+	isl_map_free(map);
+	if (equal < 0)
+		return -1;
+
+	str = "{ [i] -> [j] }";
+	map = isl_map_read_from_str(ctx, str);
+	map = isl_map_equate(map, isl_dim_in, 0, isl_dim_in, 0);
+	equal = map_check_equal(map, "{ [i] -> [j] }");
+	isl_map_free(map);
+	if (equal < 0)
+		return -1;
+
+	str = "{ [i] -> [j] }";
+	map = isl_map_read_from_str(ctx, str);
+	map = isl_map_oppose(map, isl_dim_in, 0, isl_dim_out, 0);
+	equal = map_check_equal(map, "{ [i] -> [-i] }");
+	isl_map_free(map);
+	if (equal < 0)
+		return -1;
+
+	str = "{ [i] -> [j] }";
+	map = isl_map_read_from_str(ctx, str);
+	map = isl_map_oppose(map, isl_dim_in, 0, isl_dim_in, 0);
+	equal = map_check_equal(map, "{ [0] -> [j] }");
+	isl_map_free(map);
+	if (equal < 0)
+		return -1;
+
+	str = "{ [i] -> [j] }";
+	map = isl_map_read_from_str(ctx, str);
+	map = isl_map_order_gt(map, isl_dim_in, 0, isl_dim_out, 0);
+	equal = map_check_equal(map, "{ [i] -> [j] : i > j }");
+	isl_map_free(map);
+	if (equal < 0)
+		return -1;
+
+	str = "{ [i] -> [j] }";
+	map = isl_map_read_from_str(ctx, str);
+	map = isl_map_order_gt(map, isl_dim_in, 0, isl_dim_in, 0);
+	equal = map_check_equal(map, "{ [i] -> [j] : false }");
+	isl_map_free(map);
+	if (equal < 0)
+		return -1;
+
+	return 0;
+}
+
+int test_eliminate(isl_ctx *ctx)
+{
+	const char *str;
+	isl_map *map;
+	int equal;
+
+	str = "{ [i] -> [j] : i = 2j }";
+	map = isl_map_read_from_str(ctx, str);
+	map = isl_map_eliminate(map, isl_dim_out, 0, 1);
+	equal = map_check_equal(map, "{ [i] -> [j] : exists a : i = 2a }");
+	isl_map_free(map);
+	if (equal < 0)
+		return -1;
+
+	return 0;
+}
+
+/* Check that isl_set_dim_residue_class detects that the values of j
+ * in the set below are all odd and that it does not detect any spurious
+ * strides.
+ */
+static int test_residue_class(isl_ctx *ctx)
+{
+	const char *str;
+	isl_set *set;
+	isl_int m, r;
+	int res;
+
+	str = "{ [i,j] : j = 4 i + 1 and 0 <= i <= 100; "
+		"[i,j] : j = 4 i + 3 and 500 <= i <= 600 }";
+	set = isl_set_read_from_str(ctx, str);
+	isl_int_init(m);
+	isl_int_init(r);
+	res = isl_set_dim_residue_class(set, 1, &m, &r);
+	if (res >= 0 &&
+	    (isl_int_cmp_si(m, 2) != 0 || isl_int_cmp_si(r, 1) != 0))
+		isl_die(ctx, isl_error_unknown, "incorrect residue class",
+			res = -1);
+	isl_int_clear(r);
+	isl_int_clear(m);
+	isl_set_free(set);
+
+	return res;
+}
+
+int test_align_parameters(isl_ctx *ctx)
+{
+	const char *str;
+	isl_space *space;
+	isl_multi_aff *ma1, *ma2;
+	int equal;
+
+	str = "{ A[B[] -> C[]] -> D[E[] -> F[]] }";
+	ma1 = isl_multi_aff_read_from_str(ctx, str);
+
+	space = isl_space_params_alloc(ctx, 1);
+	space = isl_space_set_dim_name(space, isl_dim_param, 0, "N");
+	ma1 = isl_multi_aff_align_params(ma1, space);
+
+	str = "[N] -> { A[B[] -> C[]] -> D[E[] -> F[]] }";
+	ma2 = isl_multi_aff_read_from_str(ctx, str);
+
+	equal = isl_multi_aff_plain_is_equal(ma1, ma2);
+
+	isl_multi_aff_free(ma1);
+	isl_multi_aff_free(ma2);
+
+	if (equal < 0)
+		return -1;
+	if (!equal)
+		isl_die(ctx, isl_error_unknown,
+			"result not as expected", return -1);
+
+	return 0;
+}
+
+static int test_list(isl_ctx *ctx)
+{
+	isl_id *a, *b, *c, *d, *id;
+	isl_id_list *list;
+	int ok;
+
+	a = isl_id_alloc(ctx, "a", NULL);
+	b = isl_id_alloc(ctx, "b", NULL);
+	c = isl_id_alloc(ctx, "c", NULL);
+	d = isl_id_alloc(ctx, "d", NULL);
+
+	list = isl_id_list_alloc(ctx, 4);
+	list = isl_id_list_add(list, a);
+	list = isl_id_list_add(list, b);
+	list = isl_id_list_add(list, c);
+	list = isl_id_list_add(list, d);
+	list = isl_id_list_drop(list, 1, 1);
+
+	if (isl_id_list_n_id(list) != 3) {
+		isl_id_list_free(list);
+		isl_die(ctx, isl_error_unknown,
+			"unexpected number of elements in list", return -1);
+	}
+
+	id = isl_id_list_get_id(list, 0);
+	ok = id == a;
+	isl_id_free(id);
+	id = isl_id_list_get_id(list, 1);
+	ok = ok && id == c;
+	isl_id_free(id);
+	id = isl_id_list_get_id(list, 2);
+	ok = ok && id == d;
+	isl_id_free(id);
+
+	isl_id_list_free(list);
+
+	if (!ok)
+		isl_die(ctx, isl_error_unknown,
+			"unexpected elements in list", return -1);
+
+	return 0;
+}
+
+const char *set_conversion_tests[] = {
+	"[N] -> { [i] : N - 1 <= 2 i <= N }",
+	"[N] -> { [i] : exists a : i = 4 a and N - 1 <= i <= N }",
+	"[N] -> { [i,j] : exists a : i = 4 a and N - 1 <= i, 2j <= N }",
+	"[N] -> { [[i]->[j]] : exists a : i = 4 a and N - 1 <= i, 2j <= N }",
+};
+
+/* Check that converting from isl_set to isl_pw_multi_aff and back
+ * to isl_set produces the original isl_set.
+ */
+static int test_set_conversion(isl_ctx *ctx)
+{
+	int i;
+	const char *str;
+	isl_set *set1, *set2;
+	isl_pw_multi_aff *pma;
+	int equal;
+
+	for (i = 0; i < ARRAY_SIZE(set_conversion_tests); ++i) {
+		str = set_conversion_tests[i];
+		set1 = isl_set_read_from_str(ctx, str);
+		pma = isl_pw_multi_aff_from_set(isl_set_copy(set1));
+		set2 = isl_set_from_pw_multi_aff(pma);
+		equal = isl_set_is_equal(set1, set2);
+		isl_set_free(set1);
+		isl_set_free(set2);
+
+		if (equal < 0)
+			return -1;
+		if (!equal)
+			isl_die(ctx, isl_error_unknown, "bad conversion",
+				return -1);
+	}
+
+	return 0;
+}
+
+/* Check that converting from isl_map to isl_pw_multi_aff and back
+ * to isl_map produces the original isl_map.
+ */
+static int test_map_conversion(isl_ctx *ctx)
+{
+	const char *str;
+	isl_map *map1, *map2;
+	isl_pw_multi_aff *pma;
+	int equal;
+
+	str = "{ [a, b, c, d] -> s0[a, b, e, f] : "
+		"exists (e0 = [(a - 2c)/3], e1 = [(-4 + b - 5d)/9], "
+		"e2 = [(-d + f)/9]: 3e0 = a - 2c and 9e1 = -4 + b - 5d and "
+		"9e2 = -d + f and f >= 0 and f <= 8 and 9e >= -5 - 2a and "
+		"9e <= -2 - 2a) }";
+	map1 = isl_map_read_from_str(ctx, str);
+	pma = isl_pw_multi_aff_from_map(isl_map_copy(map1));
+	map2 = isl_map_from_pw_multi_aff(pma);
+	equal = isl_map_is_equal(map1, map2);
+	isl_map_free(map1);
+	isl_map_free(map2);
+
+	if (equal < 0)
+		return -1;
+	if (!equal)
+		isl_die(ctx, isl_error_unknown, "bad conversion", return -1);
+
+	return 0;
+}
+
+static int test_conversion(isl_ctx *ctx)
+{
+	if (test_set_conversion(ctx) < 0)
+		return -1;
+	if (test_map_conversion(ctx) < 0)
+		return -1;
+	return 0;
+}
+
+/* Check that isl_basic_map_curry does not modify input.
+ */
+static int test_curry(isl_ctx *ctx)
+{
+	const char *str;
+	isl_basic_map *bmap1, *bmap2;
+	int equal;
+
+	str = "{ [A[] -> B[]] -> C[] }";
+	bmap1 = isl_basic_map_read_from_str(ctx, str);
+	bmap2 = isl_basic_map_curry(isl_basic_map_copy(bmap1));
+	equal = isl_basic_map_is_equal(bmap1, bmap2);
+	isl_basic_map_free(bmap1);
+	isl_basic_map_free(bmap2);
+
+	if (equal < 0)
+		return -1;
+	if (equal)
+		isl_die(ctx, isl_error_unknown,
+			"curried map should not be equal to original",
+			return -1);
+
+	return 0;
+}
+
+struct {
+	const char *set;
+	const char *ma;
+	const char *res;
+} preimage_tests[] = {
+	{ "{ B[i,j] : 0 <= i < 10 and 0 <= j < 100 }",
+	  "{ A[j,i] -> B[i,j] }",
+	  "{ A[j,i] : 0 <= i < 10 and 0 <= j < 100 }" },
+	{ "{ rat: B[i,j] : 0 <= i, j and 3 i + 5 j <= 100 }",
+	  "{ A[a,b] -> B[a/2,b/6] }",
+	  "{ rat: A[a,b] : 0 <= a, b and 9 a + 5 b <= 600 }" },
+	{ "{ B[i,j] : 0 <= i, j and 3 i + 5 j <= 100 }",
+	  "{ A[a,b] -> B[a/2,b/6] }",
+	  "{ A[a,b] : 0 <= a, b and 9 a + 5 b <= 600 and "
+		    "exists i,j : a = 2 i and b = 6 j }" },
+	{ "[n] -> { S[i] : 0 <= i <= 100 }", "[n] -> { S[n] }",
+	  "[n] -> { : 0 <= n <= 100 }" },
+	{ "{ B[i] : 0 <= i < 100 and exists a : i = 4 a }",
+	  "{ A[a] -> B[2a] }",
+	  "{ A[a] : 0 <= a < 50 and exists b : a = 2 b }" },
+	{ "{ B[i] : 0 <= i < 100 and exists a : i = 4 a }",
+	  "{ A[a] -> B[([a/2])] }",
+	  "{ A[a] : 0 <= a < 200 and exists b : [a/2] = 4 b }" },
+	{ "{ B[i,j,k] : 0 <= i,j,k <= 100 }",
+	  "{ A[a] -> B[a,a,a/3] }",
+	  "{ A[a] : 0 <= a <= 100 and exists b : a = 3 b }" },
+	{ "{ B[i,j] : j = [(i)/2] } ", "{ A[i,j] -> B[i/3,j] }",
+	  "{ A[i,j] : j = [(i)/6] and exists a : i = 3 a }" },
+};
+
+int test_preimage(isl_ctx *ctx)
+{
+	int i;
+	isl_basic_set *bset1, *bset2;
+	isl_multi_aff *ma;
+	int equal;
+
+	for (i = 0; i < ARRAY_SIZE(preimage_tests); ++i) {
+		bset1 = isl_basic_set_read_from_str(ctx, preimage_tests[i].set);
+		ma = isl_multi_aff_read_from_str(ctx, preimage_tests[i].ma);
+		bset2 = isl_basic_set_read_from_str(ctx, preimage_tests[i].res);
+		bset1 = isl_basic_set_preimage_multi_aff(bset1, ma);
+		equal = isl_basic_set_is_equal(bset1, bset2);
+		isl_basic_set_free(bset1);
+		isl_basic_set_free(bset2);
+		if (equal < 0)
+			return -1;
+		if (!equal)
+			isl_die(ctx, isl_error_unknown, "bad preimage",
+				return -1);
+	}
+
+	return 0;
+}
+
+struct {
+	const char *ma1;
+	const char *ma;
+	const char *res;
+} pullback_tests[] = {
+	{ "{ B[i,j] -> C[i + 2j] }" , "{ A[a,b] -> B[b,a] }",
+	  "{ A[a,b] -> C[b + 2a] }" },
+	{ "{ B[i] -> C[2i] }", "{ A[a] -> B[(a)/2] }", "{ A[a] -> C[a] }" },
+	{ "{ B[i] -> C[(i)/2] }", "{ A[a] -> B[2a] }", "{ A[a] -> C[a] }" },
+	{ "{ B[i] -> C[(i)/2] }", "{ A[a] -> B[(a)/3] }",
+	  "{ A[a] -> C[(a)/6] }" },
+	{ "{ B[i] -> C[2i] }", "{ A[a] -> B[5a] }", "{ A[a] -> C[10a] }" },
+	{ "{ B[i] -> C[2i] }", "{ A[a] -> B[(a)/3] }",
+	  "{ A[a] -> C[(2a)/3] }" },
+	{ "{ B[i,j] -> C[i + j] }", "{ A[a] -> B[a,a] }", "{ A[a] -> C[2a] }"},
+	{ "{ B[a] -> C[a,a] }", "{ A[i,j] -> B[i + j] }",
+	  "{ A[i,j] -> C[i + j, i + j] }"},
+	{ "{ B[i] -> C[([i/2])] }", "{ B[5] }", "{ C[2] }" },
+	{ "[n] -> { B[i,j] -> C[([i/2]) + 2j] }",
+	  "[n] -> { B[n,[n/3]] }", "[n] -> { C[([n/2]) + 2*[n/3]] }", },
+};
+
+static int test_pullback(isl_ctx *ctx)
+{
+	int i;
+	isl_multi_aff *ma1, *ma2;
+	isl_multi_aff *ma;
+	int equal;
+
+	for (i = 0; i < ARRAY_SIZE(pullback_tests); ++i) {
+		ma1 = isl_multi_aff_read_from_str(ctx, pullback_tests[i].ma1);
+		ma = isl_multi_aff_read_from_str(ctx, pullback_tests[i].ma);
+		ma2 = isl_multi_aff_read_from_str(ctx, pullback_tests[i].res);
+		ma1 = isl_multi_aff_pullback_multi_aff(ma1, ma);
+		equal = isl_multi_aff_plain_is_equal(ma1, ma2);
+		isl_multi_aff_free(ma1);
+		isl_multi_aff_free(ma2);
+		if (equal < 0)
+			return -1;
+		if (!equal)
+			isl_die(ctx, isl_error_unknown, "bad pullback",
+				return -1);
+	}
+
+	return 0;
+}
+
+/* Check that negation is printed correctly.
+ */
+static int test_ast(isl_ctx *ctx)
+{
+	isl_ast_expr *expr, *expr1, *expr2, *expr3;
+	char *str;
+	int ok;
+
+	expr1 = isl_ast_expr_from_id(isl_id_alloc(ctx, "A", NULL));
+	expr2 = isl_ast_expr_from_id(isl_id_alloc(ctx, "B", NULL));
+	expr = isl_ast_expr_add(expr1, expr2);
+	expr = isl_ast_expr_neg(expr);
+	str = isl_ast_expr_to_str(expr);
+	ok = str ? !strcmp(str, "-(A + B)") : -1;
+	free(str);
+	isl_ast_expr_free(expr);
+
+	if (ok < 0)
+		return -1;
+	if (!ok)
+		isl_die(ctx, isl_error_unknown,
+			"isl_ast_expr printed incorrectly", return -1);
+
+	expr1 = isl_ast_expr_from_id(isl_id_alloc(ctx, "A", NULL));
+	expr2 = isl_ast_expr_from_id(isl_id_alloc(ctx, "B", NULL));
+	expr = isl_ast_expr_add(expr1, expr2);
+	expr3 = isl_ast_expr_from_id(isl_id_alloc(ctx, "C", NULL));
+	expr = isl_ast_expr_sub(expr3, expr);
+	str = isl_ast_expr_to_str(expr);
+	ok = str ? !strcmp(str, "C - (A + B)") : -1;
+	free(str);
+	isl_ast_expr_free(expr);
+
+	if (ok < 0)
+		return -1;
+	if (!ok)
+		isl_die(ctx, isl_error_unknown,
+			"isl_ast_expr printed incorrectly", return -1);
+
+	return 0;
+}
+
+/* Internal data structure for before_for and after_for callbacks.
+ *
+ * depth is the current depth
+ * before is the number of times before_for has been called
+ * after is the number of times after_for has been called
+ */
+struct isl_test_codegen_data {
+	int depth;
+	int before;
+	int after;
+};
+
+/* This function is called before each for loop in the AST generated
+ * from test_ast_gen1.
+ *
+ * Increment the number of calls and the depth.
+ * Check that the space returned by isl_ast_build_get_schedule_space
+ * matches the target space of the schedule returned by
+ * isl_ast_build_get_schedule.
+ * Return an isl_id that is checked by the corresponding call
+ * to after_for.
+ */
+static __isl_give isl_id *before_for(__isl_keep isl_ast_build *build,
+	void *user)
+{
+	struct isl_test_codegen_data *data = user;
+	isl_ctx *ctx;
+	isl_space *space;
+	isl_union_map *schedule;
+	isl_union_set *uset;
+	isl_set *set;
+	int empty;
+	char name[] = "d0";
+
+	ctx = isl_ast_build_get_ctx(build);
+
+	if (data->before >= 3)
+		isl_die(ctx, isl_error_unknown,
+			"unexpected number of for nodes", return NULL);
+	if (data->depth >= 2)
+		isl_die(ctx, isl_error_unknown,
+			"unexpected depth", return NULL);
+
+	snprintf(name, sizeof(name), "d%d", data->depth);
+	data->before++;
+	data->depth++;
+
+	schedule = isl_ast_build_get_schedule(build);
+	uset = isl_union_map_range(schedule);
+	if (!uset)
+		return NULL;
+	if (isl_union_set_n_set(uset) != 1) {
+		isl_union_set_free(uset);
+		isl_die(ctx, isl_error_unknown,
+			"expecting single range space", return NULL);
+	}
+
+	space = isl_ast_build_get_schedule_space(build);
+	set = isl_union_set_extract_set(uset, space);
+	isl_union_set_free(uset);
+	empty = isl_set_is_empty(set);
+	isl_set_free(set);
+
+	if (empty < 0)
+		return NULL;
+	if (empty)
+		isl_die(ctx, isl_error_unknown,
+			"spaces don't match", return NULL);
+
+	return isl_id_alloc(ctx, name, NULL);
+}
+
+/* This function is called after each for loop in the AST generated
+ * from test_ast_gen1.
+ *
+ * Increment the number of calls and decrement the depth.
+ * Check that the annotation attached to the node matches
+ * the isl_id returned by the corresponding call to before_for.
+ */
+static __isl_give isl_ast_node *after_for(__isl_take isl_ast_node *node,
+	__isl_keep isl_ast_build *build, void *user)
+{
+	struct isl_test_codegen_data *data = user;
+	isl_id *id;
+	const char *name;
+	int valid;
+
+	data->after++;
+	data->depth--;
+
+	if (data->after > data->before)
+		isl_die(isl_ast_node_get_ctx(node), isl_error_unknown,
+			"mismatch in number of for nodes",
+			return isl_ast_node_free(node));
+
+	id = isl_ast_node_get_annotation(node);
+	if (!id)
+		isl_die(isl_ast_node_get_ctx(node), isl_error_unknown,
+			"missing annotation", return isl_ast_node_free(node));
+
+	name = isl_id_get_name(id);
+	valid = name && atoi(name + 1) == data->depth;
+	isl_id_free(id);
+
+	if (!valid)
+		isl_die(isl_ast_node_get_ctx(node), isl_error_unknown,
+			"wrong annotation", return isl_ast_node_free(node));
+
+	return node;
+}
+
+/* Check that the before_each_for and after_each_for callbacks
+ * are called for each for loop in the generated code,
+ * that they are called in the right order and that the isl_id
+ * returned from the before_each_for callback is attached to
+ * the isl_ast_node passed to the corresponding after_each_for call.
+ */
+static int test_ast_gen1(isl_ctx *ctx)
+{
+	const char *str;
+	isl_set *set;
+	isl_union_map *schedule;
+	isl_ast_build *build;
+	isl_ast_node *tree;
+	struct isl_test_codegen_data data;
+
+	str = "[N] -> { : N >= 10 }";
+	set = isl_set_read_from_str(ctx, str);
+	str = "[N] -> { A[i,j] -> S[8,i,3,j] : 0 <= i,j <= N; "
+		    "B[i,j] -> S[8,j,9,i] : 0 <= i,j <= N }";
+	schedule = isl_union_map_read_from_str(ctx, str);
+
+	data.before = 0;
+	data.after = 0;
+	data.depth = 0;
+	build = isl_ast_build_from_context(set);
+	build = isl_ast_build_set_before_each_for(build,
+			&before_for, &data);
+	build = isl_ast_build_set_after_each_for(build,
+			&after_for, &data);
+	tree = isl_ast_build_ast_from_schedule(build, schedule);
+	isl_ast_build_free(build);
+	if (!tree)
+		return -1;
+
+	isl_ast_node_free(tree);
+
+	if (data.before != 3 || data.after != 3)
+		isl_die(ctx, isl_error_unknown,
+			"unexpected number of for nodes", return -1);
+
+	return 0;
+}
+
+/* Check that the AST generator handles domains that are integrally disjoint
+ * but not ratinoally disjoint.
+ */
+static int test_ast_gen2(isl_ctx *ctx)
+{
+	const char *str;
+	isl_set *set;
+	isl_union_map *schedule;
+	isl_union_map *options;
+	isl_ast_build *build;
+	isl_ast_node *tree;
+
+	str = "{ A[i,j] -> [i,j] : 0 <= i,j <= 1 }";
+	schedule = isl_union_map_read_from_str(ctx, str);
+	set = isl_set_universe(isl_space_params_alloc(ctx, 0));
+	build = isl_ast_build_from_context(set);
+
+	str = "{ [i,j] -> atomic[1] : i + j = 1; [i,j] -> unroll[1] : i = j }";
+	options = isl_union_map_read_from_str(ctx, str);
+	build = isl_ast_build_set_options(build, options);
+	tree = isl_ast_build_ast_from_schedule(build, schedule);
+	isl_ast_build_free(build);
+	if (!tree)
+		return -1;
+	isl_ast_node_free(tree);
+
+	return 0;
+}
+
+/* Increment *user on each call.
+ */
+static __isl_give isl_ast_node *count_domains(__isl_take isl_ast_node *node,
+	__isl_keep isl_ast_build *build, void *user)
+{
+	int *n = user;
+
+	(*n)++;
+
+	return node;
+}
+
+/* Test that unrolling tries to minimize the number of instances.
+ * In particular, for the schedule given below, make sure it generates
+ * 3 nodes (rather than 101).
+ */
+static int test_ast_gen3(isl_ctx *ctx)
+{
+	const char *str;
+	isl_set *set;
+	isl_union_map *schedule;
+	isl_union_map *options;
+	isl_ast_build *build;
+	isl_ast_node *tree;
+	int n_domain = 0;
+
+	str = "[n] -> { A[i] -> [i] : 0 <= i <= 100 and n <= i <= n + 2 }";
+	schedule = isl_union_map_read_from_str(ctx, str);
+	set = isl_set_universe(isl_space_params_alloc(ctx, 0));
+
+	str = "{ [i] -> unroll[0] }";
+	options = isl_union_map_read_from_str(ctx, str);
+
+	build = isl_ast_build_from_context(set);
+	build = isl_ast_build_set_options(build, options);
+	build = isl_ast_build_set_at_each_domain(build,
+			&count_domains, &n_domain);
+	tree = isl_ast_build_ast_from_schedule(build, schedule);
+	isl_ast_build_free(build);
+	if (!tree)
+		return -1;
+
+	isl_ast_node_free(tree);
+
+	if (n_domain != 3)
+		isl_die(ctx, isl_error_unknown,
+			"unexpected number of for nodes", return -1);
+
+	return 0;
+}
+
+/* Check that if the ast_build_exploit_nested_bounds options is set,
+ * we do not get an outer if node in the generated AST,
+ * while we do get such an outer if node if the options is not set.
+ */
+static int test_ast_gen4(isl_ctx *ctx)
+{
+	const char *str;
+	isl_set *set;
+	isl_union_map *schedule;
+	isl_ast_build *build;
+	isl_ast_node *tree;
+	enum isl_ast_node_type type;
+	int enb;
+
+	enb = isl_options_get_ast_build_exploit_nested_bounds(ctx);
+	str = "[N,M] -> { A[i,j] -> [i,j] : 0 <= i <= N and 0 <= j <= M }";
+
+	isl_options_set_ast_build_exploit_nested_bounds(ctx, 1);
+
+	schedule = isl_union_map_read_from_str(ctx, str);
+	set = isl_set_universe(isl_space_params_alloc(ctx, 0));
+	build = isl_ast_build_from_context(set);
+	tree = isl_ast_build_ast_from_schedule(build, schedule);
+	isl_ast_build_free(build);
+	if (!tree)
+		return -1;
+
+	type = isl_ast_node_get_type(tree);
+	isl_ast_node_free(tree);
+
+	if (type == isl_ast_node_if)
+		isl_die(ctx, isl_error_unknown,
+			"not expecting if node", return -1);
+
+	isl_options_set_ast_build_exploit_nested_bounds(ctx, 0);
+
+	schedule = isl_union_map_read_from_str(ctx, str);
+	set = isl_set_universe(isl_space_params_alloc(ctx, 0));
+	build = isl_ast_build_from_context(set);
+	tree = isl_ast_build_ast_from_schedule(build, schedule);
+	isl_ast_build_free(build);
+	if (!tree)
+		return -1;
+
+	type = isl_ast_node_get_type(tree);
+	isl_ast_node_free(tree);
+
+	if (type != isl_ast_node_if)
+		isl_die(ctx, isl_error_unknown,
+			"expecting if node", return -1);
+
+	isl_options_set_ast_build_exploit_nested_bounds(ctx, enb);
+
+	return 0;
+}
+
+static int test_ast_gen(isl_ctx *ctx)
+{
+	if (test_ast_gen1(ctx) < 0)
+		return -1;
+	if (test_ast_gen2(ctx) < 0)
+		return -1;
+	if (test_ast_gen3(ctx) < 0)
+		return -1;
+	if (test_ast_gen4(ctx) < 0)
+		return -1;
+	return 0;
+}
+
+/* Check if dropping output dimensions from an isl_pw_multi_aff
+ * works properly.
+ */
+static int test_pw_multi_aff(isl_ctx *ctx)
+{
+	const char *str;
+	isl_pw_multi_aff *pma1, *pma2;
+	int equal;
+
+	str = "{ [i,j] -> [i+j, 4i-j] }";
+	pma1 = isl_pw_multi_aff_read_from_str(ctx, str);
+	str = "{ [i,j] -> [4i-j] }";
+	pma2 = isl_pw_multi_aff_read_from_str(ctx, str);
+
+	pma1 = isl_pw_multi_aff_drop_dims(pma1, isl_dim_out, 0, 1);
+
+	equal = isl_pw_multi_aff_plain_is_equal(pma1, pma2);
+
+	isl_pw_multi_aff_free(pma1);
+	isl_pw_multi_aff_free(pma2);
+	if (equal < 0)
+		return -1;
+	if (!equal)
+		isl_die(ctx, isl_error_unknown,
+			"expressions not equal", return -1);
+
+	return 0;
+}
+
+/* This is a regression test for a bug where isl_basic_map_simplify
+ * would end up in an infinite loop.  In particular, we construct
+ * an empty basic set that is not obviously empty.
+ * isl_basic_set_is_empty marks the basic set as empty.
+ * After projecting out i3, the variable can be dropped completely,
+ * but isl_basic_map_simplify refrains from doing so if the basic set
+ * is empty and would end up in an infinite loop if it didn't test
+ * explicitly for empty basic maps in the outer loop.
+ */
+static int test_simplify(isl_ctx *ctx)
+{
+	const char *str;
+	isl_basic_set *bset;
+	int empty;
+
+	str = "{ [i0, i1, i2, i3] : i0 >= -2 and 6i2 <= 4 + i0 + 5i1 and "
+		"i2 <= 22 and 75i2 <= 111 + 13i0 + 60i1 and "
+		"25i2 >= 38 + 6i0 + 20i1 and i0 <= -1 and i2 >= 20 and "
+		"i3 >= i2 }";
+	bset = isl_basic_set_read_from_str(ctx, str);
+	empty = isl_basic_set_is_empty(bset);
+	bset = isl_basic_set_project_out(bset, isl_dim_set, 3, 1);
+	isl_basic_set_free(bset);
+	if (!bset)
+		return -1;
+	if (!empty)
+		isl_die(ctx, isl_error_unknown,
+			"basic set should be empty", return -1);
+
+	return 0;
+}
+
+/* This is a regression test for a bug where isl_tab_basic_map_partial_lexopt
+ * with gbr context would fail to disable the use of the shifted tableau
+ * when transferring equalities for the input to the context, resulting
+ * in invalid sample values.
+ */
+static int test_partial_lexmin(isl_ctx *ctx)
+{
+	const char *str;
+	isl_basic_set *bset;
+	isl_basic_map *bmap;
+	isl_map *map;
+
+	str = "{ [1, b, c, 1 - c] -> [e] : 2e <= -c and 2e >= -3 + c }";
+	bmap = isl_basic_map_read_from_str(ctx, str);
+	str = "{ [a, b, c, d] : c <= 1 and 2d >= 6 - 4b - c }";
+	bset = isl_basic_set_read_from_str(ctx, str);
+	map = isl_basic_map_partial_lexmin(bmap, bset, NULL);
+	isl_map_free(map);
+
+	if (!map)
+		return -1;
+
+	return 0;
+}
+
+struct {
+	const char *name;
+	int (*fn)(isl_ctx *ctx);
+} tests [] = {
+	{ "partial lexmin", &test_partial_lexmin },
+	{ "simplify", &test_simplify },
+	{ "curry", &test_curry },
+	{ "piecewise multi affine expressions", &test_pw_multi_aff },
+	{ "conversion", &test_conversion },
+	{ "list", &test_list },
+	{ "align parameters", &test_align_parameters },
+	{ "preimage", &test_preimage },
+	{ "pullback", &test_pullback },
+	{ "AST", &test_ast },
+	{ "AST generation", &test_ast_gen },
+	{ "eliminate", &test_eliminate },
+	{ "residue class", &test_residue_class },
+	{ "div", &test_div },
+	{ "slice", &test_slice },
+	{ "fixed power", &test_fixed_power },
+	{ "sample", &test_sample },
+	{ "output", &test_output },
+	{ "vertices", &test_vertices },
+	{ "fixed", &test_fixed },
+	{ "equal", &test_equal },
+	{ "product", &test_product },
+	{ "dim_max", &test_dim_max },
+	{ "affine", &test_aff },
+	{ "injective", &test_injective },
+	{ "schedule", &test_schedule },
+	{ "union_pw", &test_union_pw },
+	{ "parse", &test_parse },
+	{ "single-valued", &test_sv },
+	{ "affine hull", &test_affine_hull },
+	{ "coalesce", &test_coalesce },
+	{ "factorize", &test_factorize },
+	{ "subset", &test_subset },
+	{ "subtract", &test_subtract },
+};
+
 int main()
 {
+	int i;
 	struct isl_ctx *ctx;
 
 	srcdir = getenv("srcdir");
 	assert(srcdir);
 
 	ctx = isl_ctx_alloc();
-	if (test_fixed(ctx) < 0)
-		goto error;
-	if (test_equal(ctx) < 0)
-		goto error;
-	if (test_product(ctx) < 0)
-		goto error;
-	if (test_dim_max(ctx) < 0)
-		goto error;
-	if (test_aff(ctx) < 0)
-		goto error;
-	if (test_injective(ctx) < 0)
-		goto error;
-	if (test_schedule(ctx) < 0)
-		goto error;
-	if (test_union_pw(ctx) < 0)
-		goto error;
-	test_factorize(ctx);
-	test_subset(ctx);
+	for (i = 0; i < ARRAY_SIZE(tests); ++i) {
+		printf("%s\n", tests[i].name);
+		if (tests[i].fn(ctx) < 0)
+			goto error;
+	}
 	test_lift(ctx);
 	test_bound(ctx);
 	test_union(ctx);
 	test_split_periods(ctx);
-	test_parse(ctx);
 	test_pwqp(ctx);
 	test_lex(ctx);
-	if (test_sv(ctx) < 0)
-		goto error;
 	test_bijective(ctx);
 	test_dep(ctx);
 	test_read(ctx);
 	test_bounded(ctx);
 	test_construction(ctx);
 	test_dim(ctx);
-	test_div(ctx);
 	test_application(ctx);
-	test_affine_hull(ctx);
 	test_convex_hull(ctx);
 	test_gist(ctx);
-	test_coalesce(ctx);
 	test_closure(ctx);
 	test_lexmin(ctx);
 	isl_ctx_free(ctx);