1 files changed, 63 insertions, 0 deletions

diff --git a/meta-oe/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99483.patch b/meta-oe/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99483.patch
new file mode 100644
index 000000000..c0be4a03b
--- /dev/null
+++ b/meta-oe/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99483.patch
@@ -0,0 +1,63 @@
+2011-02-11  Richard Sandiford  <richard.sandiford@linaro.org>
+
+        gcc/
+        * cse.c (count_reg_usage): Check side_effects_p.  Remove the
+        separate check for volatile asms.
+
+        gcc/testsuite/
+        * gcc.dg/torture/volatile-pic-1.c: New test.
+
+=== modified file 'gcc/cse.c'
+--- old/gcc/cse.c       2010-11-26 12:03:32 +0000
++++ new/gcc/cse.c       2011-02-11 09:27:19 +0000
+@@ -6634,9 +6634,10 @@
+     case CALL_INSN:
+     case INSN:
+     case JUMP_INSN:
+-      /* We expect dest to be NULL_RTX here.  If the insn may trap, mark
+-         this fact by setting DEST to pc_rtx.  */
+-      if (insn_could_throw_p (x))
++      /* We expect dest to be NULL_RTX here.  If the insn may trap,
++        or if it cannot be deleted due to side-effects, mark this fact
++        by setting DEST to pc_rtx.  */
++      if (insn_could_throw_p (x) || side_effects_p (PATTERN (x)))
+        dest = pc_rtx;
+       if (code == CALL_INSN)
+        count_reg_usage (CALL_INSN_FUNCTION_USAGE (x), counts, dest, incr);
+@@ -6676,10 +6677,6 @@
+       return;
+ 
+     case ASM_OPERANDS:
+-      /* If the asm is volatile, then this insn cannot be deleted,
+-        and so the inputs *must* be live.  */
+-      if (MEM_VOLATILE_P (x))
+-       dest = NULL_RTX;
+       /* Iterate over just the inputs, not the constraints as well.  */
+       for (i = ASM_OPERANDS_INPUT_LENGTH (x) - 1; i >= 0; i--)
+        count_reg_usage (ASM_OPERANDS_INPUT (x, i), counts, dest, incr);
+
+=== added file 'gcc/testsuite/gcc.dg/torture/volatile-pic-1.c'
+--- old/gcc/testsuite/gcc.dg/torture/volatile-pic-1.c   1970-01-01 00:00:00 +0000
++++ new/gcc/testsuite/gcc.dg/torture/volatile-pic-1.c   2011-02-11 09:27:19 +0000
+@@ -0,0 +1,20 @@
++/* { dg-do run } */
++/* { dg-require-visibility "" } */
++/* { dg-require-effective-target fpic } */
++/* { dg-options "-fPIC" } */
++
++volatile int x __attribute__((visibility("hidden")));
++
++void __attribute__((noinline)) bar (void)
++{
++#if defined (__arm__)
++  asm volatile ("mov r3,%0" :: "r" (0xdeadbeef) : "r3");
++#endif
++  (void) x;
++}
++
++int main (void)
++{
++  bar ();
++  return 0;
++}
+