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-rw-r--r--gcc-4.7/gcc/config/arm/arm.c8
-rw-r--r--gcc-4.8/gcc/config/arm/arm.c8
2 files changed, 12 insertions, 4 deletions
diff --git a/gcc-4.7/gcc/config/arm/arm.c b/gcc-4.7/gcc/config/arm/arm.c
index 8d36af8..a309606 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;
diff --git a/gcc-4.8/gcc/config/arm/arm.c b/gcc-4.8/gcc/config/arm/arm.c
index dd88f0b..4015387 100644
--- a/gcc-4.8/gcc/config/arm/arm.c
+++ b/gcc-4.8/gcc/config/arm/arm.c
@@ -18144,9 +18144,13 @@ 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;