From c527fd1f14c27855a37f2e8ac5346ce8d940ced2 Mon Sep 17 00:00:00 2001 From: Tudor Florea Date: Thu, 16 Oct 2014 03:05:19 +0200 Subject: initial commit for Enea Linux 4.0-140929 Migrated from the internal git server on the daisy-enea-point-release branch Signed-off-by: Tudor Florea --- .../gcc/gcc-4.8/0037-gcc-4.8-PR56797.patch | 66 ++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 meta/recipes-devtools/gcc/gcc-4.8/0037-gcc-4.8-PR56797.patch (limited to 'meta/recipes-devtools/gcc/gcc-4.8/0037-gcc-4.8-PR56797.patch') diff --git a/meta/recipes-devtools/gcc/gcc-4.8/0037-gcc-4.8-PR56797.patch b/meta/recipes-devtools/gcc/gcc-4.8/0037-gcc-4.8-PR56797.patch new file mode 100644 index 0000000000..b5d7b864fd --- /dev/null +++ b/meta/recipes-devtools/gcc/gcc-4.8/0037-gcc-4.8-PR56797.patch @@ -0,0 +1,66 @@ +Upstream-Status: Backport +Signed-off-by: Khem Raj + +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 +X-Patchwork-Id: 237891 +Message-Id: <000801ce3ce1$23fbdd60$6bf39820$@yorsh@arm.com> +To: "GCC Patches" +Cc: , "Richard Earnshaw" , + "Ramana Radhakrishnan" + +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 + + 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; -- cgit v1.2.3-54-g00ecf