IndependentBlocks: Add a couple of test cases.

llvm-svn: 177438

diff --git a/polly/test/IndependentBlocks/inter_bb_scalar_dep.ll b/polly/test/IndependentBlocks/inter_bb_scalar_dep.ll
new file mode 100644 (file)
index 0000000..dd595f1
--- /dev/null
+++ b/polly/test/IndependentBlocks/inter_bb_scalar_dep.ll
@@ -0,0 +1,51 @@
+; RUN: opt %loadPolly -basicaa -polly-independent -S < %s | FileCheck %s
+
+; void f(long A[], int N, int *init_ptr) {
+;   long i, j;
+;
+;   for (i = 0; i < N; ++i) {
+;     init = *init_ptr;
+;     for (i = 0; i < N; ++i) {
+;       A[i] = init + 2;
+;     }
+;   }
+; }
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @f(i64* noalias %A, i64 %N, i64* noalias %init_ptr) nounwind {
+entry:
+
+; CHECK: entry
+; CHECK: %init.s2a = alloca i64
+; CHECK: br label %for.i
+  br label %for.i
+
+for.i:
+  %indvar.i = phi i64 [ 0, %entry ], [ %indvar.i.next, %for.i.end ]
+  %indvar.i.next = add nsw i64 %indvar.i, 1
+  br label %entry.next
+
+entry.next:
+  %init = load i64* %init_ptr
+  br label %for.j
+
+for.j:
+  %indvar.j = phi i64 [ 0, %entry.next ], [ %indvar.j.next, %for.j ]
+  %init_plus_two = add i64 %init, 2
+; CHECK: %init.loadarray = load i64* %init.s2a
+; CHECK: %init_plus_two = add i64 %init.loadarray, 2
+  %scevgep = getelementptr i64* %A, i64 %indvar.j
+  store i64 %init_plus_two, i64* %scevgep
+  %indvar.j.next = add nsw i64 %indvar.j, 1
+  %exitcond.j = icmp eq i64 %indvar.j.next, %N
+  br i1 %exitcond.j, label %for.i.end, label %for.j
+
+for.i.end:
+  %exitcond.i = icmp eq i64 %indvar.i.next, %N
+  br i1 %exitcond.i, label %return, label %for.i
+
+return:
+  ret void
+}

diff --git a/polly/test/IndependentBlocks/intra_and_inter_bb_scalar_dep.ll b/polly/test/IndependentBlocks/intra_and_inter_bb_scalar_dep.ll
new file mode 100644 (file)
index 0000000..40704f7
--- /dev/null
+++ b/polly/test/IndependentBlocks/intra_and_inter_bb_scalar_dep.ll
@@ -0,0 +1,58 @@
+; RUN: opt %loadPolly -basicaa -polly-independent -S < %s | FileCheck %s
+
+; void f(long A[], int N, int *init_ptr) {
+;   long i, j;
+;
+;   for (i = 0; i < N; ++i) {
+;     init = *init_ptr;
+;     for (i = 0; i < N; ++i) {
+;       init2 = *init_ptr;
+;       A[i] = init + init2;
+;     }
+;   }
+; }
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @f(i64* noalias %A, i64 %N, i64* noalias %init_ptr) nounwind {
+entry:
+
+; CHECK: entry
+; CHECK: %init.s2a = alloca i64
+; CHECK: br label %for.i
+  br label %for.i
+
+for.i:
+  %indvar.i = phi i64 [ 0, %entry ], [ %indvar.i.next, %for.i.end ]
+  %indvar.i.next = add nsw i64 %indvar.i, 1
+  br label %entry.next
+
+entry.next:
+  %init = load i64* %init_ptr
+  br label %for.j
+
+for.j:
+  %indvar.j = phi i64 [ 0, %entry.next ], [ %indvar.j.next, %for.j ]
+  %init_2 = load i64* %init_ptr
+  %init_sum = add i64 %init, %init_2
+; CHECK: %init_2 = load i64* %init_ptr
+; CHECK: %init.loadarray = load i64* %init.s2a
+; CHECK: %init_sum = add i64 %init.loadarray, %init_2
+
+; The SCEV of %init_sum is (%init + %init_2). It is referring to both an
+; UnknownValue in the same and in a different basic block. We want only the
+; reference to the different basic block to be replaced.
+  %scevgep = getelementptr i64* %A, i64 %indvar.j
+  store i64 %init_sum, i64* %scevgep
+  %indvar.j.next = add nsw i64 %indvar.j, 1
+  %exitcond.j = icmp eq i64 %indvar.j.next, %N
+  br i1 %exitcond.j, label %for.i.end, label %for.j
+
+for.i.end:
+  %exitcond.i = icmp eq i64 %indvar.i.next, %N
+  br i1 %exitcond.i, label %return, label %for.i
+
+return:
+  ret void
+}

diff --git a/polly/test/IndependentBlocks/intra_bb_scalar_dep.ll b/polly/test/IndependentBlocks/intra_bb_scalar_dep.ll
new file mode 100644 (file)
index 0000000..62dfbd6
--- /dev/null
+++ b/polly/test/IndependentBlocks/intra_bb_scalar_dep.ll
@@ -0,0 +1,51 @@
+; RUN: opt %loadPolly -basicaa -polly-independent -S < %s | FileCheck %s
+
+; void f(long A[], int N, int *init_ptr) {
+;   long i, j;
+;
+;   for (i = 0; i < N; ++i) {
+;     for (i = 0; i < N; ++i) {
+;       init = *init_ptr;
+;       A[i] = init + 2;
+;     }
+;   }
+; }
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @f(i64* noalias %A, i64 %N, i64* noalias %init_ptr) nounwind {
+entry:
+
+; CHECK: entry
+; CHECK: br label %for.i
+  br label %for.i
+
+for.i:
+  %indvar.i = phi i64 [ 0, %entry ], [ %indvar.i.next, %for.i.end ]
+  %indvar.i.next = add nsw i64 %indvar.i, 1
+  br label %entry.next
+
+entry.next:
+  br label %for.j
+
+for.j:
+  %indvar.j = phi i64 [ 0, %entry.next ], [ %indvar.j.next, %for.j ]
+  %init = load i64* %init_ptr
+  %init_plus_two = add i64 %init, 2
+; The scalar evolution of %init_plus_two is (2 + %init). So we have a
+; non-trivial scalar evolution referring to a value in the same basic block.
+; We want to ensure that this scalar is not translated into a memory copy.
+  %scevgep = getelementptr i64* %A, i64 %indvar.j
+  store i64 %init_plus_two, i64* %scevgep
+  %indvar.j.next = add nsw i64 %indvar.j, 1
+  %exitcond.j = icmp eq i64 %indvar.j.next, %N
+  br i1 %exitcond.j, label %for.i.end, label %for.j
+
+for.i.end:
+  %exitcond.i = icmp eq i64 %indvar.i.next, %N
+  br i1 %exitcond.i, label %return, label %for.i
+
+return:
+  ret void
+}