aaron/ispc
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Simplify ~mask codegen to emit single XOR like other places in the code.

Browse Source
This commit is contained in:
james.brodman
2013-05-15 16:57:41 -04:00
parent a38fcf1127
commit 60c5bef90f
1 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
ctx.cpp
View File

@@ -554,7 +554,9 @@ FunctionEmitContext::EndIf() {
}
llvm::Value *notBreakOrContinue =
NotOperator(bcLanes, "!(break|continue)_lanes");
BinaryOperator(llvm::Instruction::Xor,
bcLanes, LLVMMaskAllOn,
"!(break|continue)_lanes");
llvm::Value *oldMask = GetInternalMask();
llvm::Value *newMask =
BinaryOperator(llvm::Instruction::And, oldMask,
@@ -659,7 +661,9 @@ FunctionEmitContext::restoreMaskGivenReturns(llvm::Value *oldMask) {
// newMask = (oldMask & ~returnedLanes)
llvm::Value *returnedLanes = LoadInst(returnedLanesPtr,
"returned_lanes");
llvm::Value *notReturned = NotOperator(returnedLanes, "~returned_lanes");
llvm::Value *notReturned = BinaryOperator(llvm::Instruction::Xor,
returnedLanes, LLVMMaskAllOn,
"~returned_lanes");
llvm::Value *newMask = BinaryOperator(llvm::Instruction::And,
oldMask, notReturned, "new_mask");
SetInternalMask(newMask);