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Remove always-true comparison, NFC.

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Summary:
Looking at r241279, I noticed that UpgradedIntrinsics only gets written
to in the following code:

    if (UpgradeIntrinsicFunction(&F, NewFn))
      UpgradedIntrinsics[&F] = NewFn;

Looking through UpgradeIntrinsicFunction, we always return false OR
NewFn will be set to a different function from our source.

This patch pulls the F != NewFn into UpgradeIntrinsicFunction as an
assert, and removes the check from callers of UpgradeIntrinsicFunction.

Reviewers: rafael, chandlerc

Subscribers: llvm-commits-list

Differential Revision: http://reviews.llvm.org/D10915

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241369 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Filipe Cabecinhas
2015-07-03 20:12:01 +00:00
parent 571beb683f
commit 177fabfc30
2 changed files with 19 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
lib/IR/AutoUpgrade.cpp
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@@ -229,6 +229,7 @@ static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
bool llvm::UpgradeIntrinsicFunction(Function *F, Function *&NewFn) {
NewFn = nullptr;
bool Upgraded = UpgradeIntrinsicFunction1(F, NewFn);
assert(F != NewFn && "Intrinsic function upgraded to the same function");
// Upgrade intrinsic attributes. This does not change the function.
if (NewFn)
@@ -710,16 +711,14 @@ void llvm::UpgradeCallsToIntrinsic(Function* F) {
// Upgrade the function and check if it is a totaly new function.
Function *NewFn;
if (UpgradeIntrinsicFunction(F, NewFn)) {
if (NewFn != F) {
// 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++))
UpgradeIntrinsicCall(CI, NewFn);
}
// Remove old function, no longer used, from the module.
F->eraseFromParent();
// 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++))
UpgradeIntrinsicCall(CI, NewFn);
}
// Remove old function, no longer used, from the module.
F->eraseFromParent();
}
}