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| author | Alon Zakai <alonzakai@gmail.com> | 2018-04-11 12:02:29 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-04-11 12:02:29 -0700 |
| commit | 92afb40eea6e9a09af2d355ff9ab6a4bd04c54bb (patch) | |
| tree | 671827c29364ef509ce2a6ba050d9b119c54c9cc /src/wasm/literal.cpp | |
| parent | 9b5ce471992033eeec9a8779bce55f2429496431 (diff) | |
| download | binaryen-92afb40eea6e9a09af2d355ff9ab6a4bd04c54bb.tar.gz binaryen-92afb40eea6e9a09af2d355ff9ab6a4bd04c54bb.tar.bz2 binaryen-92afb40eea6e9a09af2d355ff9ab6a4bd04c54bb.zip | |
Some simple integer math opts (#1504)
Stuff like x + 5 != 2 => x != -3.
Also some cleanups of utility functions I noticed while writing this, isTypeFloat => isFloatType.
Inspired by
https://github.com/golang/go/blob/master/src/cmd/compile/internal/ssa/gen/generic.rules
Diffstat (limited to 'src/wasm/literal.cpp')
| -rw-r--r-- | src/wasm/literal.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/wasm/literal.cpp b/src/wasm/literal.cpp index dca3d64b4..a6dcd17f0 100644 --- a/src/wasm/literal.cpp +++ b/src/wasm/literal.cpp @@ -249,8 +249,8 @@ Literal Literal::convertUToF64() const { Literal Literal::neg() const { switch (type) { - case Type::i32: return Literal(i32 ^ 0x80000000); - case Type::i64: return Literal(int64_t(i64 ^ 0x8000000000000000ULL)); + case Type::i32: return Literal(-uint32_t(i32)); + case Type::i64: return Literal(-uint64_t(i64)); case Type::f32: return Literal(i32 ^ 0x80000000).castToF32(); case Type::f64: return Literal(int64_t(i64 ^ 0x8000000000000000ULL)).castToF64(); default: WASM_UNREACHABLE(); |