commit 8a66d422721ae5999737d7825701ff22097d287b Author: Andrew Hsieh Date: Mon Apr 14 21:05:51 2014 -0700 [android] Fix ARM generates insufficient alignment for NEON vst/vld See d909af3e2469aad87d5c3e79b93c778fd26c03a9 Change-Id: Ie1de9f946f397196bb6f1623f5add86933739484 Signed-off-by: Dmitry Moskalchuk diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 5974c65d3..71b2c7aa9 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -22403,9 +22403,13 @@ 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;