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Correct this test and simplify.

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This commit is contained in:
Nick Lewycky 2019-09-24 10:54:23 -07:00
parent 07b5991080
commit be181f9119
1 changed files with 17 additions and 18 deletions
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35
lib/singlepass-backend/src/codegen_x64.rs
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@ -1512,24 +1512,23 @@ impl X64FunctionCode {
a.emit_add(Size::S64, Location::GPR(tmp_base), Location::GPR(tmp_bound)); a.emit_add(Size::S64, Location::GPR(tmp_base), Location::GPR(tmp_bound));
a.emit_mov(Size::S32, addr, Location::GPR(tmp_addr)); a.emit_mov(Size::S32, addr, Location::GPR(tmp_addr));
if offset != 0 && value_size != 0 { // This branch is used for emitting "faster" code for the special case of (offset + value_size) not exceeding u32 range.
// This branch is used for emitting "faster" code for the special case of (offset + value_size) not exceeding u32 range. match (offset as u32).checked_add(value_size as u32) {
match (offset as u32).checked_add(value_size as u32) { Some(0) => {}
Some(x) => { Some(x) => {
a.emit_add(Size::S64, Location::Imm32(x), Location::GPR(tmp_addr)); a.emit_add(Size::S64, Location::Imm32(x), Location::GPR(tmp_addr));
} }
None => { None => {
a.emit_add( a.emit_add(
Size::S64, Size::S64,
Location::Imm32(offset as u32), Location::Imm32(offset as u32),
Location::GPR(tmp_addr), Location::GPR(tmp_addr),
); );
a.emit_add( a.emit_add(
Size::S64, Size::S64,
Location::Imm32(value_size as u32), Location::Imm32(value_size as u32),
Location::GPR(tmp_addr), Location::GPR(tmp_addr),
); );
}
} }
} }