diff options
Diffstat (limited to 'src/cmd/compile/internal/ssa/gen/generic.rules')
| -rw-r--r-- | src/cmd/compile/internal/ssa/gen/generic.rules | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ssa/gen/generic.rules b/src/cmd/compile/internal/ssa/gen/generic.rules index fab45243ed..9dd20a7cfa 100644 --- a/src/cmd/compile/internal/ssa/gen/generic.rules +++ b/src/cmd/compile/internal/ssa/gen/generic.rules @@ -1968,6 +1968,9 @@ (Div32F x (Const32F <t> [c])) && reciprocalExact32(c) => (Mul32F x (Const32F <t> [1/c])) (Div64F x (Const64F <t> [c])) && reciprocalExact64(c) => (Mul64F x (Const64F <t> [1/c])) +// rewrite single-precision sqrt expression "float32(math.Sqrt(float64(x)))" +(Cvt64Fto32F sqrt0:(Sqrt (Cvt32Fto64F x))) && sqrt0.Uses==1 => (Sqrt32 x) + (Sqrt (Const64F [c])) && !math.IsNaN(math.Sqrt(c)) => (Const64F [math.Sqrt(c)]) // for rewriting results of some late-expanded rewrites (below) |