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Diffstat (limited to 'meta/recipes-devtools/gcc/gcc-4.9/0037-gcc-4.8-PR56797.patch')
| -rw-r--r-- | meta/recipes-devtools/gcc/gcc-4.9/0037-gcc-4.8-PR56797.patch | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/meta/recipes-devtools/gcc/gcc-4.9/0037-gcc-4.8-PR56797.patch b/meta/recipes-devtools/gcc/gcc-4.9/0037-gcc-4.8-PR56797.patch deleted file mode 100644 index b5d7b86..0000000 --- a/meta/recipes-devtools/gcc/gcc-4.9/0037-gcc-4.8-PR56797.patch +++ /dev/null @@ -1,66 +0,0 @@ -Upstream-Status: Backport -Signed-off-by: Khem Raj <raj.khem@gmail.com> - -From patchwork Fri Apr 19 09:34:49 2013 -Content-Type: text/plain; charset="utf-8" -MIME-Version: 1.0 -Content-Transfer-Encoding: 7bit -Subject: [ARM] Fix PR56797 -Date: Thu, 18 Apr 2013 23:34:49 -0000 -From: Greta Yorsh <Greta.Yorsh@arm.com> -X-Patchwork-Id: 237891 -Message-Id: <000801ce3ce1$23fbdd60$6bf39820$@yorsh@arm.com> -To: "GCC Patches" <gcc-patches@gcc.gnu.org> -Cc: <raj.khem@gmail.com>, "Richard Earnshaw" <Richard.Earnshaw@arm.com>, - "Ramana Radhakrishnan" <Ramana.Radhakrishnan@arm.com> - -Fix PR56797 -http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56797 - -The problem is that peephole optimizer thinks it can generate an ldm, but -the pattern for ldm no longer matches, because after r188738 it requires -that if one of the destination registers is SP then the base register must -be SP, and it's not SP in the test case. - -The test case fails on armv5t but doesn't fail on armv6t2 or armv7-a because -peephole doesn't trigger there (because there is a different epilogue -sequence). It looks like a latent problem for other architecture or CPUs. - -This patch adds this condition to the peephole optimizer. - -No regression on qemu for arm-none-eabi and fixes the test reported in the -PR. I couldn't minimize the test sufficiently to include it in the -testsuite. - -Ok for trunk? - -Thanks, -Greta - -gcc/ - -2013-04-18 Greta Yorsh <Greta.Yorsh@arm.com> - - PR target/56797 - * config/arm/arm.c (load_multiple_sequence): Require SP - as base register for loads if SP is in the register list. - - -diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c -index d00849c..60fef78 100644 ---- a/gcc/config/arm/arm.c -+++ b/gcc/config/arm/arm.c -@@ -10347,6 +10347,13 @@ load_multiple_sequence (rtx *operands, int nops, int *regs, int *saved_order, - || (i != nops - 1 && unsorted_regs[i] == base_reg)) - return 0; - -+ /* Don't allow SP to be loaded unless it is also the base -+ register. It guarantees that SP is reset correctly when -+ an LDM instruction is interruptted. Otherwise, we might -+ end up with a corrupt stack. */ -+ if (unsorted_regs[i] == SP_REGNUM && base_reg != SP_REGNUM) -+ return 0; -+ - unsorted_offsets[i] = INTVAL (offset); - if (i == 0 || unsorted_offsets[i] < unsorted_offsets[order[0]]) - order[0] = i; |
