From cc5c935937d01d96c6b070dae31854180249064c Mon Sep 17 00:00:00 2001 From: Jakub Jelinek Date: Tue, 10 Mar 2020 09:26:44 +0100 Subject: [PATCH] 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 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. --- gcc/ChangeLog | 7 +++++++ gcc/config/i386/i386.md | 17 +++++++++++------ gcc/testsuite/ChangeLog | 5 +++++ gcc/testsuite/gcc.target/i386/pr94088.c | 9 +++++++++ 4 files changed, 32 insertions(+), 6 deletions(-) create mode 100644 gcc/testsuite/gcc.target/i386/pr94088.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 085ef66..5d5bbf4 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2020-03-10 Jakub Jelinek + + 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. + 2020-03-09 Jason Merrill * gdbinit.in (pgs): Fix typo in documentation. 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 == 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)]))] diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index f91af78..5ed497d 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2020-03-10 Jakub Jelinek + + PR target/94088 + * gcc.target/i386/pr94088.c: New test. + 2020-03-09 Marek Polacek PR c++/92031 - bogus taking address of rvalue error. diff --git a/gcc/testsuite/gcc.target/i386/pr94088.c b/gcc/testsuite/gcc.target/i386/pr94088.c new file mode 100644 index 0000000..d8cdba5 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr94088.c @@ -0,0 +1,9 @@ +/* PR target/94088 */ +/* { dg-do compile } */ +/* { dg-options "-mtbm -O1 -fira-loop-pressure -fno-dce" } */ + +double +foo (int x) +{ + return x / (4294950402U % -65472 + 161); +} -- 2.7.4