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[InlineCost] Remove visitUnaryInstruction() 

The simplifyInstruction() in visitUnaryInstruction() does not trigger
for all of check-llvm. Looking at all delegates to UnaryInstruction in
InstVisitor, the only instructions that either don't have a visitor in
CallAnalyzer, or redirect to UnaryInstruction, are VAArgInst and Alloca.
VAArgInst will never get simplified, and visitUnaryInstruction(Alloca)
would always return false anyway.

Reviewed By: mtrofin, lebedev.ri

Differential Revision: https://reviews.llvm.org/D101577
This commit is contained in:
Arthur Eubanks 2021-04-29 14:19:14 -07:00
parent 544be70864
commit a3a798d49d
1 changed files with 7 additions and 23 deletions
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30
llvm/lib/Analysis/InlineCost.cpp
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@ -390,7 +390,6 @@ protected:
bool visitPtrToInt(PtrToIntInst &I);
bool visitIntToPtr(IntToPtrInst &I);
bool visitCastInst(CastInst &I);
bool visitUnaryInstruction(UnaryInstruction &I);
bool visitCmpInst(CmpInst &I);
bool visitSub(BinaryOperator &I);
bool visitBinaryOperator(BinaryOperator &I);
@ -1040,6 +1039,8 @@ bool CallAnalyzer::isGEPFree(GetElementPtrInst &GEP) {
}
bool CallAnalyzer::visitAlloca(AllocaInst &I) {
disableSROA(I.getOperand(0));
// Check whether inlining will turn a dynamic alloca into a static
// alloca and handle that case.
if (I.isArrayAllocation()) {
@ -1057,11 +1058,9 @@ bool CallAnalyzer::visitAlloca(AllocaInst &I) {
AllocatedSize = SaturatingMultiplyAdd(
AllocSize->getLimitedValue(), DL.getTypeAllocSize(Ty).getKnownMinSize(),
AllocatedSize);
if (AllocatedSize > InlineConstants::MaxSimplifiedDynamicAllocaToInline) {
if (AllocatedSize > InlineConstants::MaxSimplifiedDynamicAllocaToInline)
HasDynamicAlloca = true;
return false;
}
return Base::visitAlloca(I);
return false;
}
}
@ -1072,15 +1071,13 @@ bool CallAnalyzer::visitAlloca(AllocaInst &I) {
SaturatingAdd(DL.getTypeAllocSize(Ty).getKnownMinSize(), AllocatedSize);
}
// We will happily inline static alloca instructions.
if (I.isStaticAlloca())
return Base::visitAlloca(I);
// FIXME: This is overly conservative. Dynamic allocas are inefficient for
// a variety of reasons, and so we would like to not inline them into
// functions which don't currently have a dynamic alloca. This simply
// disables inlining altogether in the presence of a dynamic alloca.
HasDynamicAlloca = true;
if (!I.isStaticAlloca())
HasDynamicAlloca = true;
return false;
}
@ -1367,19 +1364,6 @@ bool CallAnalyzer::visitCastInst(CastInst &I) {
TargetTransformInfo::TCC_Free;
}
bool CallAnalyzer::visitUnaryInstruction(UnaryInstruction &I) {
Value *Operand = I.getOperand(0);
if (simplifyInstruction(I, [&](SmallVectorImpl<Constant *> &COps) {
return ConstantFoldInstOperands(&I, COps[0], DL);
}))
return true;
// Disable any SROA on the argument to arbitrary unary instructions.
disableSROA(Operand);
return false;
}
bool CallAnalyzer::paramHasAttr(Argument *A, Attribute::AttrKind Attr) {
return CandidateCall.paramHasAttr(A->getArgNo(), Attr);
}