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| author | Uros Bizjak <ubizjak@gmail.com> | 2022-09-01 20:20:06 +0200 |
|---|---|---|
| committer | Uros Bizjak <ubizjak@gmail.com> | 2022-09-01 20:20:43 +0200 |
| commit | 5205f5b54ad769969ffd89978ba1bcee41380bf8 (patch) | |
| tree | 0fc3e9ec207c7dd65d2f14c452f0805e16ea4701 /gcc | |
| parent | bb17c5030dc47c69c700e0fd0145285dc8f913a2 (diff) | |
| download | gcc-5205f5b54ad769969ffd89978ba1bcee41380bf8.zip gcc-5205f5b54ad769969ffd89978ba1bcee41380bf8.tar.gz gcc-5205f5b54ad769969ffd89978ba1bcee41380bf8.tar.bz2 | |
i386: Fix conversion of move to/from AX_REG into xchg [PR106707]
The conversion of a move pattern where both operands are AX_REG
should be prevented.
2022-09-01 Uroš Bizjak <ubizjak@gmail.com>
gcc/ChangeLog:
PR target/106707
* config/i386/i386.md (moves to/from AX_REG into xchg peephole2):
Do not convert a move pattern where both operands are AX_REG.
gcc/testsuite/ChangeLog:
PR target/106707
* gcc.target/i386/pr106707.c: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/i386/i386.md | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr106707.c | 19 |
2 files changed, 21 insertions, 2 deletions
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index a4a18cf..1aef1af 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -3043,8 +3043,8 @@ [(set (match_operand:SWI48 0 "general_reg_operand") (match_operand:SWI48 1 "general_reg_operand"))] "optimize_size > 1 - && (REGNO (operands[0]) == AX_REG - || REGNO (operands[1]) == AX_REG) + && ((REGNO (operands[0]) == AX_REG) + != (REGNO (operands[1]) == AX_REG)) && optimize_insn_for_size_p () && peep2_reg_dead_p (1, operands[1])" [(parallel [(set (match_dup 0) (match_dup 1)) diff --git a/gcc/testsuite/gcc.target/i386/pr106707.c b/gcc/testsuite/gcc.target/i386/pr106707.c new file mode 100644 index 0000000..a127ccd --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr106707.c @@ -0,0 +1,19 @@ +/* PR target/106707 */ +/* { dg-do compile { target int128 } } */ +/* { dg-options "-Oz -g -fno-cprop-registers -fno-dce" } */ + +typedef unsigned __attribute__((__vector_size__ (8))) V; + +unsigned __int128 ii; +unsigned x, y; + +V v; + +void +foo (long a) +{ + long l = a != x; + int i = __builtin_add_overflow_p (y * ii, 0, 0); + V u = ii < x | v, w = x <= u < i & y <= x / ii; + v = __builtin_shufflevector (v, w, 1, 2) + (V) l; +} |