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[WIP][profcheck] Codegen Prepare #166857

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[WIP][profcheck] Codegen Prepare #166857

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17 changes: 15 additions & 2 deletions llvm/lib/CodeGen/CodeGenPrepare.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -275,6 +275,9 @@ static cl::opt<bool>
DisableDeletePHIs("disable-cgp-delete-phis", cl::Hidden, cl::init(false),
cl::desc("Disable elimination of dead PHI nodes."));

namespace llvm {
extern cl::opt<bool> ProfcheckDisableMetadataFixes;
}
namespace {

enum ExtType {
Expand Down Expand Up @@ -7450,7 +7453,12 @@ bool CodeGenPrepare::optimizeShiftInst(BinaryOperator *Shift) {
BinaryOperator::BinaryOps Opcode = Shift->getOpcode();
Value *NewTVal = Builder.CreateBinOp(Opcode, Shift->getOperand(0), TVal);
Value *NewFVal = Builder.CreateBinOp(Opcode, Shift->getOperand(0), FVal);
Value *NewSel = Builder.CreateSelect(Cond, NewTVal, NewFVal);
Value *NewSel =
Builder.CreateSelect(Cond, NewTVal, NewFVal, /*Name=*/"",
/*MDFrom=*/
ProfcheckDisableMetadataFixes
? nullptr
: dyn_cast<Instruction>(Shift->getOperand(1)));
replaceAllUsesWith(Shift, NewSel, FreshBBs, IsHugeFunc);
Shift->eraseFromParent();
return true;
Expand Down Expand Up @@ -7485,7 +7493,12 @@ bool CodeGenPrepare::optimizeFunnelShift(IntrinsicInst *Fsh) {
Value *X = Fsh->getOperand(0), *Y = Fsh->getOperand(1);
Value *NewTVal = Builder.CreateIntrinsic(Opcode, Ty, {X, Y, TVal});
Value *NewFVal = Builder.CreateIntrinsic(Opcode, Ty, {X, Y, FVal});
Value *NewSel = Builder.CreateSelect(Cond, NewTVal, NewFVal);
Value *NewSel =
Builder.CreateSelect(Cond, NewTVal, NewFVal, /*Name=*/"",
/*MDFrom=*/
ProfcheckDisableMetadataFixes
? nullptr
: dyn_cast<Instruction>(Fsh->getOperand(2)));
replaceAllUsesWith(Fsh, NewSel, FreshBBs, IsHugeFunc);
Fsh->eraseFromParent();
return true;
Expand Down
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