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| author | Uros Bizjak <ubizjak@gmail.com> | 2021-05-07 11:15:07 +0200 |
|---|---|---|
| committer | Uros Bizjak <ubizjak@gmail.com> | 2021-05-07 11:16:34 +0200 |
| commit | 92f372f00936a549de2cb9764eee722bb07959ba (patch) | |
| tree | b2b7c6433508db45f3138429165edcfb22d3f933 /gcc/config/i386/i386-expand.c | |
| parent | 323b18d54b960d3ef64f60ad20838ef958334dc0 (diff) | |
| download | gcc-92f372f00936a549de2cb9764eee722bb07959ba.tar.gz | |
i386: Do not emit mask compares for mode sizes < 16 [PR100445]
Recent addition of v*cond* patterns for MMXMODEI modes allows 64bit MMX
modes to enter ix86_expand_sse_cmp. ix86_use_mask_cmp_p was not prepared
to reject mode sizes < 16, resulting in ICE due to unavailability of 64bit
masked PCOM instructions.
2021-05-07 Uroš Bizjak <ubizjak@gmail.com>
gcc/
PR target/100445
* config/i386/i386-expand.c (ix86_use_mask_cmp_p):
Return false for mode sizes < 16.
gcc/testsuite/
PR target/100445
* gcc.target/i386/pr100445-1.c: New test.
Diffstat (limited to 'gcc/config/i386/i386-expand.c')
| -rw-r--r-- | gcc/config/i386/i386-expand.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c index 4dfe7d6c282..61b2f921f41 100644 --- a/gcc/config/i386/i386-expand.c +++ b/gcc/config/i386/i386-expand.c @@ -3490,7 +3490,11 @@ static bool ix86_use_mask_cmp_p (machine_mode mode, machine_mode cmp_mode, rtx op_true, rtx op_false) { - if (GET_MODE_SIZE (mode) == 64) + int vector_size = GET_MODE_SIZE (mode); + + if (vector_size < 16) + return false; + else if (vector_size == 64) return true; /* When op_true is NULL, op_false must be NULL, or vice versa. */ |