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| author | Bill Schmidt <wschmidt@linux.vnet.ibm.com> | 2013-08-14 20:38:33 +0000 |
|---|---|---|
| committer | William Schmidt <wschmidt@gcc.gnu.org> | 2013-08-14 20:38:33 +0000 |
| commit | 6469da2cb2148e7d46f65f69fcf7bbb979859dee (patch) | |
| tree | 5bb45cd306ebd5116d5828e9efdf0a82dc847b80 /gcc/config/rs6000 | |
| parent | 4ca890e22e169bdbb2399d0c6b7c98111164e86a (diff) | |
| download | gcc-6469da2cb2148e7d46f65f69fcf7bbb979859dee.zip gcc-6469da2cb2148e7d46f65f69fcf7bbb979859dee.tar.gz gcc-6469da2cb2148e7d46f65f69fcf7bbb979859dee.tar.bz2 | |
re PR target/57949 ([powerpc64] Structure parameter alignment issue with vector extensions)
gcc:
2013-08-14 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/57949
* doc/invoke.texi: Add documentation of mcompat-align-parm
option.
* config/rs6000/rs6000.opt: Add mcompat-align-parm option.
* config/rs6000/rs6000.c (rs6000_function_arg_boundary): For AIX
and Linux, correct BLKmode alignment when 128-bit alignment is
required and compatibility flag is not set.
(rs6000_gimplify_va_arg): For AIX and Linux, honor specified
alignment for zero-size arguments when compatibility flag is not
set.
gcc/testsuite:
2013-08-14 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/57949
* gcc.target/powerpc/pr57949-1.c: New.
* gcc.target/powerpc/pr57949-2.c: New.
From-SVN: r201750
Diffstat (limited to 'gcc/config/rs6000')
| -rw-r--r-- | gcc/config/rs6000/rs6000.c | 9 | ||||
| -rw-r--r-- | gcc/config/rs6000/rs6000.opt | 4 |
2 files changed, 9 insertions, 4 deletions
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 30cd696..c1d4b99 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -8339,8 +8339,8 @@ rs6000_function_arg_boundary (enum machine_mode mode, const_tree type) || (type && TREE_CODE (type) == VECTOR_TYPE && int_size_in_bytes (type) >= 16)) return 128; - else if (TARGET_MACHO - && rs6000_darwin64_abi + else if (((TARGET_MACHO && rs6000_darwin64_abi) + || (DEFAULT_ABI == ABI_AIX && !rs6000_compat_align_parm)) && mode == BLKmode && type && TYPE_ALIGN (type) > 64) return 128; @@ -9888,8 +9888,9 @@ rs6000_gimplify_va_arg (tree valist, tree type, gimple_seq *pre_p, We don't need to check for pass-by-reference because of the test above. We can return a simplifed answer, since we know there's no offset to add. */ - if (TARGET_MACHO - && rs6000_darwin64_abi + if (((TARGET_MACHO + && rs6000_darwin64_abi) + || (DEFAULT_ABI == ABI_AIX && !rs6000_compat_align_parm)) && integer_zerop (TYPE_SIZE (type))) { unsigned HOST_WIDE_INT align, boundary; diff --git a/gcc/config/rs6000/rs6000.opt b/gcc/config/rs6000/rs6000.opt index f36e475..cd83cb2 100644 --- a/gcc/config/rs6000/rs6000.opt +++ b/gcc/config/rs6000/rs6000.opt @@ -546,3 +546,7 @@ Use ISA 2.07 transactional memory (HTM) instructions mquad-memory Target Report Mask(QUAD_MEMORY) Var(rs6000_isa_flags) Generate the quad word memory instructions (lq/stq/lqarx/stqcx). + +mcompat-align-parm +Target Report Var(rs6000_compat_align_parm) Init(0) Save +Generate aggregate parameter passing code with at most 64-bit alignment. |