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| author | Uros Bizjak <ubizjak@gmail.com> | 2020-12-02 08:15:03 +0100 |
|---|---|---|
| committer | Uros Bizjak <ubizjak@gmail.com> | 2020-12-02 08:28:11 +0100 |
| commit | 018248ef6d03ca0088d5928928f966df99af134c (patch) | |
| tree | 65623437285c5439c5f005480e6a91397e7376d0 /gcc | |
| parent | 49ca22dd67817acd196e81f7615162a88cb39587 (diff) | |
| download | gcc-018248ef6d03ca0088d5928928f966df99af134c.zip gcc-018248ef6d03ca0088d5928928f966df99af134c.tar.gz gcc-018248ef6d03ca0088d5928928f966df99af134c.tar.bz2 | |
i386: Fix abs an maxmin expanders for TARGET_PARTIAL_REG_STALL [PR98079].
QImode shold be enabled only for !TARGET_PARTIAL_REG_STALL
2020-12-02 Uroš Bizjak <ubizjak@gmail.com>
PR target/98079
gcc/
* config/i386/i386.md (abs<mode>2): Enable QImode
only for !TARGET_PARTIAL_REG_STALL.
(*abs<mode>2_1): Ditto.
(<maxmin:code><mode>3): Ditto.
(*<maxmin:code><mode>3_1): Ditto.
gcc/testsuite/
* gcc.target/i386/pr98079.c: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/i386/i386.md | 8 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr98079.c | 13 |
2 files changed, 19 insertions, 2 deletions
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index 7c25ae2..76e9499 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -10184,7 +10184,8 @@ (abs:SDWIM (match_operand:SDWIM 1 "general_operand"))) (clobber (reg:CC FLAGS_REG))])] - "TARGET_CMOVE" + "TARGET_CMOVE + && (<MODE>mode != QImode || !TARGET_PARTIAL_REG_STALL)" { if (TARGET_EXPAND_ABS) { @@ -10257,6 +10258,7 @@ (match_operand:SWI 1 "general_operand"))) (clobber (reg:CC FLAGS_REG))] "TARGET_CMOVE + && (<MODE>mode != QImode || !TARGET_PARTIAL_REG_STALL) && ix86_pre_reload_split ()" "#" "&& 1" @@ -18972,7 +18974,8 @@ (match_operand:SDWIM 1 "register_operand") (match_operand:SDWIM 2 "general_operand"))) (clobber (reg:CC FLAGS_REG))])] - "TARGET_CMOVE") + "TARGET_CMOVE + && (<MODE>mode != QImode || !TARGET_PARTIAL_REG_STALL)") (define_insn_and_split "*<code><dwi>3_doubleword" [(set (match_operand:<DWI> 0 "register_operand") @@ -19039,6 +19042,7 @@ (match_operand:SWI 2 "general_operand"))) (clobber (reg:CC FLAGS_REG))] "TARGET_CMOVE + && (<MODE>mode != QImode || !TARGET_PARTIAL_REG_STALL) && ix86_pre_reload_split ()" "#" "&& 1" diff --git a/gcc/testsuite/gcc.target/i386/pr98079.c b/gcc/testsuite/gcc.target/i386/pr98079.c new file mode 100644 index 0000000..8de0ec3 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr98079.c @@ -0,0 +1,13 @@ +/* PR target/98079 */ +/* { dg-do compile { target ia32 } } */ +/* { dg-options "-O2 -march=pentium3" } */ + +typedef __UINT8_TYPE__ uint8_t; + +uint8_t foo (uint8_t x) +{ + if (x & 0x80) + x = -x; + + return x; +} |