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GCC bug fix for <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801>.
Initially discussed at
<http://lists.gnu.org/archive/html/guix-devel/2014-09/msg00283.html>.
Patch from <https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=212740>.
2014-07-17 Richard Biener <rguenther@suse.de>
PR rtl-optimization/61801
* sched-deps.c (sched_analyze_2): For ASM_OPERANDS and
ASM_INPUT don't set reg_pending_barrier if it appears in a
debug-insn.
--- gcc-4_8-branch/gcc/sched-deps.c 2014/07/17 07:48:49 212739
+++ gcc-4_8-branch/gcc/sched-deps.c 2014/07/17 07:49:44 212740
@@ -2744,7 +2744,8 @@
Consider for instance a volatile asm that changes the fpu rounding
mode. An insn should not be moved across this even if it only uses
pseudo-regs because it might give an incorrectly rounded result. */
- if (code != ASM_OPERANDS || MEM_VOLATILE_P (x))
+ if ((code != ASM_OPERANDS || MEM_VOLATILE_P (x))
+ && !DEBUG_INSN_P (insn))
reg_pending_barrier = TRUE_BARRIER;
/* For all ASM_OPERANDS, we must traverse the vector of input operands.
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