From 92afb40eea6e9a09af2d355ff9ab6a4bd04c54bb Mon Sep 17 00:00:00 2001 From: Alon Zakai Date: Wed, 11 Apr 2018 12:02:29 -0700 Subject: 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 --- src/wasm/literal.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/wasm/literal.cpp') 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(); -- cgit v1.2.3