maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

at the end of instcombine, explicitly clear WorklistMap. 

This shrinks it down to something small.  On the testcase
from PR1432, this speeds up instcombine from 0.7959s to 0.5000s,
(59%)

llvm-svn: 40840
This commit is contained in:
Chris Lattner 2007-08-05 08:47:58 +00:00
parent 4515601f1b
commit f0da7975ea
1 changed files with 9 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
llvm/lib/Transforms/Scalar/InstructionCombining.cpp
View File

@ -870,11 +870,10 @@ static void ComputeSignedMinMaxValuesFromKnownBits(const Type *Ty,
// could have the specified known zero and known one bits, returning them in
// min/max.
static void ComputeUnsignedMinMaxValuesFromKnownBits(const Type *Ty,
const APInt& KnownZero,
const APInt& KnownOne,
APInt& Min,
APInt& Max) {
uint32_t BitWidth = cast<IntegerType>(Ty)->getBitWidth();
const APInt &KnownZero,
const APInt &KnownOne,
APInt &Min, APInt &Max) {
uint32_t BitWidth = cast<IntegerType>(Ty)->getBitWidth(); BitWidth = BitWidth;
assert(KnownZero.getBitWidth() == BitWidth &&
KnownOne.getBitWidth() == BitWidth &&
Min.getBitWidth() == BitWidth && Max.getBitWidth() &&
@ -1885,7 +1884,7 @@ Instruction *InstCombiner::FoldOpIntoPhi(Instruction &I) {
if (I.getNumOperands() == 2) {
Constant *C = cast<Constant>(I.getOperand(1));
for (unsigned i = 0; i != NumPHIValues; ++i) {
Value *InV;
Value *InV = 0;
if (Constant *InC = dyn_cast<Constant>(PN->getIncomingValue(i))) {
if (CmpInst *CI = dyn_cast<CmpInst>(&I))
InV = ConstantExpr::getCompare(CI->getPredicate(), InC, C);
@ -4095,7 +4094,7 @@ Instruction *InstCombiner::visitXor(BinaryOperator &I) {
// xor X, X = 0, even if X is nested in a sequence of Xor's.
if (Instruction *Result = AssociativeOpt(I, XorSelf(Op1))) {
assert(Result == &I && "AssociativeOpt didn't work?");
assert(Result == &I && "AssociativeOpt didn't work?"); Result=Result;
return ReplaceInstUsesWith(I, Constant::getNullValue(I.getType()));
}
@ -10051,6 +10050,9 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
}
assert(WorklistMap.empty() && "Worklist empty, but map not?");
// Do an explicit clear, this shrinks the map if needed.
WorklistMap.clear();
return Changed;
}