re PR target/24600 (unrecognizable instruction)

ChangeLog:

	PR target/24600
	* loop.c (loop_givs_rescan): Use force_operand to expand
	complex GIVs.

testsuite/ChangeLog:

	PR target/24600
	* gcc.dg/pr24600.c: New test.

From-SVN: r106404

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 64a4297..e590fff 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2005-11-02  Ulrich Weigand  <uweigand@de.ibm.com>
+
+       PR target/24600
+       * loop.c (loop_givs_rescan): Use force_operand to expand
+       complex GIVs.
+
 2005-11-02  Andrew Pinski  <pinskia@physics.uc.edu>
 
        PR 22429

diff --git a/gcc/loop.c b/gcc/loop.c
index b16c6a7..6df6302 100644 (file)
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -5497,9 +5497,16 @@ loop_givs_rescan (struct loop *loop, struct iv_class *bl, rtx *reg_map)
          /* Not replaceable; emit an insn to set the original
             giv reg from the reduced giv.  */
          else if (REG_P (*v->location))
-           loop_insn_emit_before (loop, 0, v->insn,
-                                  gen_move_insn (*v->location,
-                                                 v->new_reg));
+           {
+             rtx tem;
+             start_sequence ();
+             tem = force_operand (v->new_reg, *v->location);
+             if (tem != *v->location)
+               emit_move_insn (*v->location, tem);
+             tem = get_insns ();
+             end_sequence ();
+             loop_insn_emit_before (loop, 0, v->insn, tem);
+           }
          else if (GET_CODE (*v->location) == PLUS
                   && REG_P (XEXP (*v->location, 0))
                   && CONSTANT_P (XEXP (*v->location, 1)))

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index aa01d33..b0e73c3 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2005-11-02  Ulrich Weigand  <uweigand@de.ibm.com>
+
+       PR target/24600
+       * gcc.dg/pr24600.c: New test.
+
 2005-11-02  Mark Mitchell  <mark@codesourcery.com>
 
        PR c++/19253

diff --git a/gcc/testsuite/gcc.dg/pr24600.c b/gcc/testsuite/gcc.dg/pr24600.c
new file mode 100644 (file)
index 0000000..62bb7ca
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr24600.c
@@ -0,0 +1,16 @@
+/* This used to ICE on s390 due to a old-loop bug.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+char *strcpy (char *dest, const char *src);
+
+void test (char *Line, int len)
+{
+  int z;
+
+  for (z = 1; z <= len; z++)
+    if (Line[z - 1])
+      strcpy (Line + z + 1, Line);
+}
+