diff options
Diffstat (limited to 'src/cmd/compile/internal/ssa/gen/ARM64.rules')
| -rw-r--r-- | src/cmd/compile/internal/ssa/gen/ARM64.rules | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/src/cmd/compile/internal/ssa/gen/ARM64.rules b/src/cmd/compile/internal/ssa/gen/ARM64.rules index 80b4005df1..3c66494ab5 100644 --- a/src/cmd/compile/internal/ssa/gen/ARM64.rules +++ b/src/cmd/compile/internal/ssa/gen/ARM64.rules @@ -643,19 +643,13 @@ (GT (CMPWconst [0] z:(ADD x y)) yes no) && z.Uses == 1 => (GTnoov (CMNW x y) yes no) (GE (CMPWconst [0] z:(ADD x y)) yes no) && z.Uses == 1 => (GEnoov (CMNW x y) yes no) +// CMP(x,-y) -> CMN(x,y) is only valid for unordered comparison, if y can be -1<<63 (EQ (CMP x z:(NEG y)) yes no) && z.Uses == 1 => (EQ (CMN x y) yes no) (NE (CMP x z:(NEG y)) yes no) && z.Uses == 1 => (NE (CMN x y) yes no) -(LT (CMP x z:(NEG y)) yes no) && z.Uses == 1 => (LT (CMN x y) yes no) -(LE (CMP x z:(NEG y)) yes no) && z.Uses == 1 => (LE (CMN x y) yes no) -(GT (CMP x z:(NEG y)) yes no) && z.Uses == 1 => (GT (CMN x y) yes no) -(GE (CMP x z:(NEG y)) yes no) && z.Uses == 1 => (GE (CMN x y) yes no) +// CMPW(x,-y) -> CMNW(x,y) is only valid for unordered comparison, if y can be -1<<31 (EQ (CMPW x z:(NEG y)) yes no) && z.Uses == 1 => (EQ (CMNW x y) yes no) (NE (CMPW x z:(NEG y)) yes no) && z.Uses == 1 => (NE (CMNW x y) yes no) -(LT (CMPW x z:(NEG y)) yes no) && z.Uses == 1 => (LT (CMNW x y) yes no) -(LE (CMPW x z:(NEG y)) yes no) && z.Uses == 1 => (LE (CMNW x y) yes no) -(GT (CMPW x z:(NEG y)) yes no) && z.Uses == 1 => (GT (CMNW x y) yes no) -(GE (CMPW x z:(NEG y)) yes no) && z.Uses == 1 => (GE (CMNW x y) yes no) (EQ (CMPconst [0] x) yes no) => (Z x yes no) (NE (CMPconst [0] x) yes no) => (NZ x yes no) |