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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 | |
| 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
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/combine.c | 7 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 2 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/20020531-1.c | 21 |
4 files changed, 35 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ba8541b..fd4663b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2002-06-10 Jakub Jelinek <jakub@redhat.com> + PR optimization/6842 + * combine.c (combine_simplify_rtx) [SUBREG]: Don't ICE if VOIDmode + operand subreg cannot be simplified. + +2002-06-10 Jakub Jelinek <jakub@redhat.com> + * varasm.c (const_hash): Handle FDESC_EXPR like ADDR_EXPR. (compare_constant): Likewise. (output_addressed_constants): Likewise. 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) diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index f90d62d..a0a0de5 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -4,6 +4,8 @@ * g++.dg/opt/vt1.C: New test. + * gcc.dg/20020531-1.c: New test. + 2002-06-07 Roger Sayle <roger@eyesopen.com> * gcc.dg/20020607-2.c: New test case. diff --git a/gcc/testsuite/gcc.dg/20020531-1.c b/gcc/testsuite/gcc.dg/20020531-1.c new file mode 100644 index 0000000..397e2a2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/20020531-1.c @@ -0,0 +1,21 @@ +/* PR optimization/6842 + This testcase caused ICE when trying to optimize V8QI subreg of VOIDmode + CONST_DOUBLE. */ +/* { dg-do compile { target i?86-*-* } } */ +/* { dg-options "-O2 -mmmx" } */ + +typedef int __v8qi __attribute__ ((__mode__ (__V8QI__))); +extern void abort (void); +extern void exit (int); + +void foo (void) +{ + unsigned long long a = 0x0102030405060708LL; + unsigned long long b = 0x1020304050607080LL; + unsigned long long c; + + c = (unsigned long long) __builtin_ia32_paddusb ((__v8qi) a, (__v8qi) b); + __builtin_ia32_emms (); + if (c != 0x1122334455667788) + abort (); +} |