https://gcc.gnu.org/g:cac032367da5a7df020eaebf7e701d6a82b4e8d6
commit r16-6426-gcac032367da5a7df020eaebf7e701d6a82b4e8d6 Author: Hongyu Wang <[email protected]> Date: Wed May 21 09:45:03 2025 +0800 [APX] i386: Use setzucc by default when APX-ZU enabled When APX-ZU enabled, all legacy setcc can directly use zu sematic to avoid potential partial-dependency. gcc/ChangeLog: * config/i386/i386.md (*setcc_qi): Force output setzucc for reg operand[0]. (*setcc_qi_slp): Likewise. gcc/testsuite/ChangeLog: * gcc.target/i386/apx-zu-3.c: New test. Diff: --- gcc/config/i386/i386.md | 15 +++++++++++++-- gcc/testsuite/gcc.target/i386/apx-zu-3.c | 8 ++++++++ 2 files changed, 21 insertions(+), 2 deletions(-) diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index cae1e1016e05..ccc927ca5ec0 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -19880,7 +19880,13 @@ (match_operator:QI 1 "ix86_comparison_operator" [(reg FLAGS_REG) (const_int 0)]))] "" - "set%C1\t%0" +{ + if (REG_P (operands[0]) + && TARGET_APX_ZU) + return "setzu%C1\t%0"; + else + return "set%C1\t%0"; +} [(set_attr "type" "setcc") (set_attr "mode" "QI")]) @@ -19889,7 +19895,12 @@ (match_operator:QI 1 "ix86_comparison_operator" [(reg FLAGS_REG) (const_int 0)]))] "" - "set%C1\t%0" +{ + if (TARGET_APX_ZU) + return "setzu%C1\t%0"; + else + return "set%C1\t%0"; +} [(set_attr "type" "setcc") (set_attr "mode" "QI")]) diff --git a/gcc/testsuite/gcc.target/i386/apx-zu-3.c b/gcc/testsuite/gcc.target/i386/apx-zu-3.c new file mode 100644 index 000000000000..3028c939c9d0 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/apx-zu-3.c @@ -0,0 +1,8 @@ +/* { dg-do compile { target { ! ia32 } } } */ +/* { dg-options "-mapxf -march=x86-64 -O2" } */ +/* { dg-final { scan-assembler-times "setzune" 1} } */ + +char foo0 (int a) +{ + return a == 0 ? 0 : 1; +}
