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| author | Jakub Jelinek <jakub@redhat.com> | 2022-02-12 11:17:41 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2022-02-12 11:17:41 +0100 |
| commit | 0538d42cdd68f6b65d72ed7768f1d00ba44f8631 (patch) | |
| tree | 41b472d762e23f8e06d22612b0a49728fc293e7a /gcc/config | |
| parent | edadc7e0510b703d9727cf5ff68d55d84bb95def (diff) | |
| download | gcc-0538d42cdd68f6b65d72ed7768f1d00ba44f8631.zip gcc-0538d42cdd68f6b65d72ed7768f1d00ba44f8631.tar.gz gcc-0538d42cdd68f6b65d72ed7768f1d00ba44f8631.tar.bz2 | |
i386: Fix up cvtsd2ss splitter [PR104502]
The following testcase ICEs, because AVX512F is enabled, AVX512VL is not,
and the cvtsd2ss insn has %xmm0-15 as output operand and %xmm16-31 as
input operand. For output operand %xmm16+ the splitter just gives up
in such case, but for such input it just emits vmovddup which requires
AVX512VL if either operand is EXT_REX_SSE_REG_P (when it is 128-bit).
The following patch fixes it by treating that case like the pre-SSE3
output != input case - move the input to output and do everything on
the output reg which is known to be < %xmm16.
2022-02-12 Jakub Jelinek <jakub@redhat.com>
PR target/104502
* config/i386/i386.md (cvtsd2ss splitter): If operands[1] is xmm16+
and AVX512VL isn't available, move operands[1] to operands[0] first.
* gcc.target/i386/pr104502.c: New test.
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/i386/i386.md | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index 74da0d4..8ffa641 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -4838,8 +4838,8 @@ movddup is available. */ if (REG_P (operands[1])) { - if (!TARGET_SSE3 - && REGNO (operands[0]) != REGNO (operands[1])) + if ((!TARGET_SSE3 && REGNO (operands[0]) != REGNO (operands[1])) + || (EXT_REX_SSE_REG_P (operands[1]) && !TARGET_AVX512VL)) { rtx tmp = lowpart_subreg (DFmode, operands[0], SFmode); emit_move_insn (tmp, operands[1]); |