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| author | Peter A. Bigot <pab@pabigot.com> | 2014-08-14 14:05:58 -0500 |
|---|---|---|
| committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2014-08-15 18:19:52 +0100 |
| commit | 06f911894a367f395139c2b0d6c2ba6371398478 (patch) | |
| tree | 8d18ad759eb216e89139601c887fc550cc5e2b25 /meta/recipes-devtools/gcc/gcc-4.9/0055-PR-rtl-optimization-61801.patch | |
| parent | e7011429e40ae96b9c9f1e7f3c6f4c1f1102607f (diff) | |
| download | openembedded-core-06f911894a367f395139c2b0d6c2ba6371398478.tar.gz openembedded-core-06f911894a367f395139c2b0d6c2ba6371398478.tar.bz2 openembedded-core-06f911894a367f395139c2b0d6c2ba6371398478.zip | |
gcc: backport patch affecting Linux kernel builds
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.
Signed-off-by: Peter A. Bigot <pab@pabigot.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-devtools/gcc/gcc-4.9/0055-PR-rtl-optimization-61801.patch')
| -rw-r--r-- | meta/recipes-devtools/gcc/gcc-4.9/0055-PR-rtl-optimization-61801.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gcc/gcc-4.9/0055-PR-rtl-optimization-61801.patch b/meta/recipes-devtools/gcc/gcc-4.9/0055-PR-rtl-optimization-61801.patch new file mode 100644 index 0000000000..b27abdef38 --- /dev/null +++ b/meta/recipes-devtools/gcc/gcc-4.9/0055-PR-rtl-optimization-61801.patch @@ -0,0 +1,36 @@ +From 556537c4ad0df4cbebb74197bb2bdea75cf5dd35 Mon Sep 17 00:00:00 2001 +From: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> +Date: Thu, 17 Jul 2014 07:48:49 +0000 +Subject: [PATCH] 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. + + +git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_9-branch@212739 138bc75d-0d04-0410-961f-82ee72b054a4 + +Upstream-Status: Backport [https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801] +Signed-off-by: Peter A. Bigot <pab@pabigot.com> + +--- + gcc/sched-deps.c | 3 ++- + +diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c +index efc4223..df29bd3 100644 +--- a/gcc/sched-deps.c ++++ b/gcc/sched-deps.c +@@ -2750,7 +2750,8 @@ sched_analyze_2 (struct deps_desc *deps, rtx x, rtx insn) + 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. +-- +1.8.5.5 + |