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| author | Uros Bizjak <ubizjak@gmail.com> | 2015-07-10 13:56:48 +0200 |
|---|---|---|
| committer | Uros Bizjak <uros@gcc.gnu.org> | 2015-07-10 13:56:48 +0200 |
| commit | d7cb4840b72b7ce93b2419fd4780b069ef1a8440 (patch) | |
| tree | fc16d787905bcfdd06f06a135effd71c3654e227 /gcc/config | |
| parent | d26fc9797bd7888d50fb8d09fbe7d258b0236444 (diff) | |
| download | gcc-d7cb4840b72b7ce93b2419fd4780b069ef1a8440.zip gcc-d7cb4840b72b7ce93b2419fd4780b069ef1a8440.tar.gz gcc-d7cb4840b72b7ce93b2419fd4780b069ef1a8440.tar.bz2 | |
re PR target/66813 (gcc.target/i386/asm-flag-5.c failed with -march=pentium)
PR target/66813
* config/i386/i386.c (ix86_md_asm_adjust): Emit movstrictqi
sequence for TARGET_ZERO_EXTEND_WITH_AND targets.
testsuite/ChangeLog:
PR target/66813
* gcc.target/i386/pr66813.c: New test.
From-SVN: r225662
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/i386/i386.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index a18c733..007e0e1 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -45842,7 +45842,17 @@ ix86_md_asm_adjust (vec<rtx> &outputs, vec<rtx> &/*inputs*/, { rtx destqi = gen_reg_rtx (QImode); emit_insn (gen_rtx_SET (destqi, x)); - x = gen_rtx_ZERO_EXTEND (dest_mode, destqi); + + if (TARGET_ZERO_EXTEND_WITH_AND + && optimize_function_for_speed_p (cfun)) + { + x = force_reg (dest_mode, const0_rtx); + + emit_insn (gen_movstrictqi + (gen_lowpart (QImode, x), destqi)); + } + else + x = gen_rtx_ZERO_EXTEND (dest_mode, destqi); } emit_insn (gen_rtx_SET (dest, x)); } |