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use range loop, try to make comments more meaningful; NFCI 

llvm-svn: 266541
This commit is contained in:
Sanjay Patel 2016-04-16 23:26:16 +00:00
parent a3f3de1747
commit a770a7ec5d
1 changed files with 7 additions and 10 deletions
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17
llvm/lib/IR/AutoUpgrade.cpp
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@ -802,21 +802,18 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
}
}
// This tests each Function to determine if it needs upgrading. When we find
// one we are interested in, we then upgrade all calls to reflect the new
// function.
void llvm::UpgradeCallsToIntrinsic(Function* F) {
void llvm::UpgradeCallsToIntrinsic(Function *F) {
assert(F && "Illegal attempt to upgrade a non-existent intrinsic.");
// Upgrade the function and check if it is a totaly new function.
// Check if this function should be upgraded and get the replacement function
// if there is one.
Function *NewFn;
if (UpgradeIntrinsicFunction(F, NewFn)) {
// Replace all uses to the old function with the new one if necessary.
for (Value::user_iterator UI = F->user_begin(), UE = F->user_end();
UI != UE;) {
if (CallInst *CI = dyn_cast<CallInst>(*UI++))
// Replace all users of the old function with the new function or new IR.
for (User *U : F->users())
if (CallInst *CI = dyn_cast<CallInst>(U))
UpgradeIntrinsicCall(CI, NewFn);
}
// Remove old function, no longer used, from the module.
F->eraseFromParent();
}