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6573521f08
A long-standing bug in gcc turns out to cause problems with unpatched Linux versions due to improved optimization enabled by gcc 4.9. The upstream fix missed the gcc-4.9.1 cut-off. It's also been applied upstream to the 4.8 branch so is being added for OE's 4.8 as well. (From OE-Core rev: 06f911894a367f395139c2b0d6c2ba6371398478) Signed-off-by: Peter A. Bigot <pab@pabigot.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
37 lines
1.3 KiB
Diff
37 lines
1.3 KiB
Diff
From 556537c4ad0df4cbebb74197bb2bdea75cf5dd35 Mon Sep 17 00:00:00 2001
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From: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
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Date: Thu, 17 Jul 2014 07:48:49 +0000
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Subject: [PATCH] 2014-07-17 Richard Biener <rguenther@suse.de>
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PR rtl-optimization/61801
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* sched-deps.c (sched_analyze_2): For ASM_OPERANDS and
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ASM_INPUT don't set reg_pending_barrier if it appears in a
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debug-insn.
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git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_9-branch@212739 138bc75d-0d04-0410-961f-82ee72b054a4
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Upstream-Status: Backport [https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801]
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Signed-off-by: Peter A. Bigot <pab@pabigot.com>
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---
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gcc/sched-deps.c | 3 ++-
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diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c
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index efc4223..df29bd3 100644
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--- a/gcc/sched-deps.c
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+++ b/gcc/sched-deps.c
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@@ -2750,7 +2750,8 @@ sched_analyze_2 (struct deps_desc *deps, rtx x, rtx insn)
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Consider for instance a volatile asm that changes the fpu rounding
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mode. An insn should not be moved across this even if it only uses
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pseudo-regs because it might give an incorrectly rounded result. */
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- if (code != ASM_OPERANDS || MEM_VOLATILE_P (x))
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+ if ((code != ASM_OPERANDS || MEM_VOLATILE_P (x))
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+ && !DEBUG_INSN_P (insn))
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reg_pending_barrier = TRUE_BARRIER;
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/* For all ASM_OPERANDS, we must traverse the vector of input operands.
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--
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1.8.5.5
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