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| author | Jakub Jelinek <jakub@redhat.com> | 2002-06-10 23:47:45 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2002-06-10 23:47:45 +0200 |
| commit | 156755acc094b11f5f26644888536feb519c5036 (patch) | |
| tree | 18ee2adc18aa0ef20dd92587a364f5917f84fe87 /gcc/combine.c | |
| parent | 5d056e9be5ad2b652f1f76dc4e31621a16e541d6 (diff) | |
| download | gcc-156755acc094b11f5f26644888536feb519c5036.zip gcc-156755acc094b11f5f26644888536feb519c5036.tar.gz gcc-156755acc094b11f5f26644888536feb519c5036.tar.bz2 | |
re PR rtl-optimization/6842 (internal compiler error using MMX intrinsics with optimization)
PR optimization/6842
* combine.c (combine_simplify_rtx) [SUBREG]: Don't ICE if VOIDmode
operand subreg cannot be simplified.
* gcc.dg/20020531-1.c: New test.
From-SVN: r54462
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 11de1c7..0005e2a 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -3866,7 +3866,12 @@ combine_simplify_rtx (x, op0_mode, last, in_dest) /* simplify_subreg can't use gen_lowpart_for_combine. */ if (CONSTANT_P (SUBREG_REG (x)) - && subreg_lowpart_offset (mode, op0_mode) == SUBREG_BYTE (x)) + && subreg_lowpart_offset (mode, op0_mode) == SUBREG_BYTE (x) + /* Don't call gen_lowpart_for_combine if the inner mode + is VOIDmode and we cannot simplify it, as SUBREG without + inner mode is invalid. */ + && (GET_MODE (SUBREG_REG (x)) != VOIDmode + || gen_lowpart_common (mode, SUBREG_REG (x)))) return gen_lowpart_for_combine (mode, SUBREG_REG (x)); if (GET_MODE_CLASS (GET_MODE (SUBREG_REG (x))) == MODE_CC) |