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[NFC] Turn unsigned counters into boolean flags 

llvm-svn: 342360
This commit is contained in:
Max Kazantsev 2018-09-17 06:33:29 +00:00
parent ae48d78054
commit 5fe3620261
1 changed files with 13 additions and 8 deletions
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21
llvm/lib/Transforms/Scalar/IndVarSimplify.cpp
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@ -601,8 +601,8 @@ bool IndVarSimplify::rewriteLoopExitValues(Loop *L, SCEVExpander &Rewriter) {
// - no use outside of the loop can take advantage of hoisting the
// computation out of the loop
if (ExitValue->getSCEVType()>=scMulExpr) {
unsigned NumHardInternalUses = 0;
unsigned NumSoftExternalUses = 0;
bool HasHardInternalUses = false;
bool HasSoftExternalUses = false;
unsigned NumUses = 0;
for (auto IB = Inst->user_begin(), IE = Inst->user_end();
IB != IE && NumUses <= 6; ++IB) {
@ -611,7 +611,7 @@ bool IndVarSimplify::rewriteLoopExitValues(Loop *L, SCEVExpander &Rewriter) {
NumUses++;
if (L->contains(UseInstr)) {
if (Opc == Instruction::Call)
NumHardInternalUses++;
HasHardInternalUses = true;
} else {
if (Opc == Instruction::PHI) {
// Do not count the Phi as a use. LCSSA may have inserted
@ -621,16 +621,21 @@ bool IndVarSimplify::rewriteLoopExitValues(Loop *L, SCEVExpander &Rewriter) {
PE = UseInstr->user_end();
PB != PE && NumUses <= 6; ++PB, ++NumUses) {
unsigned PhiOpc = cast<Instruction>(*PB)->getOpcode();
if (PhiOpc != Instruction::Call && PhiOpc != Instruction::Ret)
NumSoftExternalUses++;
if (PhiOpc != Instruction::Call &&
PhiOpc != Instruction::Ret) {
HasSoftExternalUses = true;
break;
}
}
continue;
}
if (Opc != Instruction::Call && Opc != Instruction::Ret)
NumSoftExternalUses++;
if (Opc != Instruction::Call && Opc != Instruction::Ret) {
HasSoftExternalUses = true;
break;
}
}
}
if (NumUses <= 6 && NumHardInternalUses && !NumSoftExternalUses)
if (NumUses <= 6 && HasHardInternalUses && !HasSoftExternalUses)
continue;
}