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| author | Jakub Jelinek <jakub@redhat.com> | 2020-03-10 09:26:44 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2020-03-10 09:26:44 +0100 |
| commit | cc5c935937d01d96c6b070dae31854180249064c (patch) | |
| tree | 55fc571195ba53c00b0abdcf2717160dc02e4cdb /gcc/config | |
| parent | c1263058ba0bc67d1767b487a1b41657db15e579 (diff) | |
| download | gcc-cc5c935937d01d96c6b070dae31854180249064c.zip gcc-cc5c935937d01d96c6b070dae31854180249064c.tar.gz gcc-cc5c935937d01d96c6b070dae31854180249064c.tar.bz2 | |
i386: Fix up *testqi_ext_3 insn&split for the *testdi_1 changes [PR94088]
In r10-1938-g460bf043c8266dd080308f4783137aee0d0f862c *testdi_1 has been
changed, so that if the mask has upper 32-bits 0 and then at least one bit
set, it requires CCZmode rather than CCNOmode, because in that case it uses
testl instruction rather than testq and so the SF flag wouldn't respect the
state of the 64-bit result.
The *testqi_ext_3 define_insn_and_split needs to match that though,
otherwise it can create an RTL pattern that used to match *testdi_1 but
doesn't anymore and we'd ICE due to an unrecognizable insn.
2020-03-10 Jakub Jelinek <jakub@redhat.com>
PR target/94088
* config/i386/i386.md (*testqi_ext_3): Call ix86_match_ccmode with
CCZmode instead of CCNOmode if operands[2] has DImode and pos + len
is 32.
* gcc.target/i386/pr94088.c: New test.
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/i386/i386.md | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index a4ee549..8b5ae34 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -8826,18 +8826,23 @@ (match_operand 3 "const_int_operand" "n") (match_operand 4 "const_int_operand" "n")) (const_int 0)]))] - "ix86_match_ccmode (insn, CCNOmode) - && ((TARGET_64BIT && GET_MODE (operands[2]) == DImode) - || GET_MODE (operands[2]) == SImode - || GET_MODE (operands[2]) == HImode - || GET_MODE (operands[2]) == QImode) + "((TARGET_64BIT && GET_MODE (operands[2]) == DImode) + || GET_MODE (operands[2]) == SImode + || GET_MODE (operands[2]) == HImode + || GET_MODE (operands[2]) == QImode) /* Ensure that resulting mask is zero or sign extended operand. */ && INTVAL (operands[4]) >= 0 && ((INTVAL (operands[3]) > 0 && INTVAL (operands[3]) + INTVAL (operands[4]) <= 32) || (<MODE>mode == DImode && INTVAL (operands[3]) > 32 - && INTVAL (operands[3]) + INTVAL (operands[4]) == 64))" + && INTVAL (operands[3]) + INTVAL (operands[4]) == 64)) + && ix86_match_ccmode (insn, + /* *testdi_1 requires CCZmode if the mask has bit + 31 set and all bits above it clear. */ + GET_MODE (operands[2]) == DImode + && INTVAL (operands[3]) + INTVAL (operands[4]) == 32 + ? CCZmode : CCNOmode)" "#" "&& 1" [(set (match_dup 0) (match_op_dup 1 [(match_dup 2) (const_int 0)]))] |