diff options
Diffstat (limited to 'gcc-4.7/gcc/config/arm')
| -rw-r--r-- | gcc-4.7/gcc/config/arm/arm.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/gcc-4.7/gcc/config/arm/arm.c b/gcc-4.7/gcc/config/arm/arm.c index 8d36af8e5..a30960681 100644 --- a/gcc-4.7/gcc/config/arm/arm.c +++ b/gcc-4.7/gcc/config/arm/arm.c @@ -17719,9 +17719,13 @@ 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; |