Patchwork backported patch for PR57459 into gcc-4_8-branch

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Submitter Vladimir Makarov
Date Aug. 13, 2013, 4:44 p.m.
Message ID <520A6285.7000501@redhat.com>
Download mbox | patch
Permalink /patch/266893/
State New
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Vladimir Makarov - Aug. 13, 2013, 4:44 p.m.
The following patch has been backported into gcc-4_8-branch.

The patch was successfully tested and bootstrapped on x86/x86-64.

Committed as rev. 201695.

2013-08-13  Vladimir Makarov  <vmakarov@redhat.com>

         Backport from mainline
         2013-06-06  Vladimir Makarov  <vmakarov@redhat.com>

         PR rtl-optimization/57459
         * lra-constraints.c (update_ebb_live_info): Fix typo for operand
         type when setting live regs.

2013-08-13  Vladimir Makarov  <vmakarov@redhat.com>

         Backport from mainline
         2013-06-06  Vladimir Makarov  <vmakarov@redhat.com>

         PR rtl-optimization/57459
         * gcc.target/i386/pr57459.c: New test.

Patch

Index: gcc/lra-constraints.c
===================================================================
--- gcc/lra-constraints.c	(revision 201689)
+++ gcc/lra-constraints.c	(working copy)
@@ -4396,7 +4396,7 @@  update_ebb_live_info (rtx head, rtx tail
 	  bitmap_clear_bit (&live_regs, reg->regno);
       /* Mark each used value as live.  */
       for (reg = curr_id->regs; reg != NULL; reg = reg->next)
-	if (reg->type == OP_IN
+	if (reg->type != OP_OUT
 	    && bitmap_bit_p (&check_only_regs, reg->regno))
 	  bitmap_set_bit (&live_regs, reg->regno);
       /* It is quite important to remove dead move insns because it
Index: gcc/testsuite/gcc.target/i386/pr57459.c
===================================================================
--- gcc/testsuite/gcc.target/i386/pr57459.c	(revision 0)
+++ gcc/testsuite/gcc.target/i386/pr57459.c	(working copy)
@@ -0,0 +1,60 @@ 
+/* PR rtl-optimization/57459 */
+/* { dg-do run } */
+/* { dg-options "-fno-inline -O2 -minline-all-stringops -fno-omit-frame-pointer" } */
+
+int total1[10], total2[10], total3[10], total4[10], total5[10], a[20];
+int len;
+
+void stackclean() {
+  void *ptr = __builtin_alloca(20000);
+  __builtin_memset(ptr, 0, 20000);
+}
+
+void foo(const char *s) {
+  int r1 = a[1];
+  int r2 = a[2];
+  int r3 = a[3];
+  int r4 = a[4];
+  int r5 = a[5];
+
+  len =  __builtin_strlen(s);
+
+  if (s != 0)
+    return;
+
+  while (r1) {
+   total1[r1] = r1;
+   r1--;
+  }
+
+  while (r2) {
+   total2[r2] = r2;
+   r2--;
+  }
+
+  while (r3) {
+   total3[r3] = r3;
+   r3--;
+  }
+
+  while (r4) {
+   total4[r4] = r4;
+   r4--;
+  }
+
+  while (r5) {
+   total5[r5] = r5;
+   r5--;
+  }
+}
+
+extern void abort (void);
+
+int main() {
+  stackclean();
+  foo("abcdefgh");
+  if (len != 8)
+    abort ();
+  return 0;
+}
+