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authorAndrew Hsieh <andrewhsieh@google.com>2014-04-14 21:05:51 -0700
committerAndrew Hsieh <andrewhsieh@google.com>2014-04-22 16:16:15 -0700
commit771c2f9542b4e84b08c107060319603d12ec8867 (patch)
tree079062146b27142aacb4df1131bbf84bfb38b8b9 /gcc-4.9
parentab583b7ca09ec4411ef84a61f109082e0e9d1ffc (diff)
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[4.9] Fix ARM/GCC-4.9 generates insufficient alignment for NEON vst/vld
See d909af3e2469aad87d5c3e79b93c778fd26c03a9 Change-Id: Ie1de9f946f397196bb6f1623f5add86933739484
Diffstat (limited to 'gcc-4.9')
-rw-r--r--gcc-4.9/gcc/config/arm/arm.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/gcc-4.9/gcc/config/arm/arm.c b/gcc-4.9/gcc/config/arm/arm.c
index e5cf50366..17d030490 100644
--- a/gcc-4.9/gcc/config/arm/arm.c
+++ b/gcc-4.9/gcc/config/arm/arm.c
@@ -21581,9 +21581,13 @@ arm_print_operand (FILE *stream, rtx x, int code)
memsize = MEM_SIZE (x);
/* Only certain alignment specifiers are supported by the hardware. */
- if (memsize == 32 && (align % 32) == 0)
+ /* Note that ARM EABI only guarentees 8-byte stack alignment. While GCC
+ honors stricter alignment of composite type in user code, it doesn't
+ observe the alignment of memory passed as an extra argument for function
+ returning large composite type. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57271 */
+ if (memsize == 32 && (align % 32) == 0 && !TARGET_AAPCS_BASED)
align_bits = 256;
- else if ((memsize == 16 || memsize == 32) && (align % 16) == 0)
+ else if ((memsize == 16 || memsize == 32) && (align % 16) == 0 && !TARGET_AAPCS_BASED)
align_bits = 128;
else if (memsize >= 8 && (align % 8) == 0)
align_bits = 64;