[CGP] convert chain of 'if' to 'switch'; NFC
This should be extended, but CGP does some strange things,
so I'm intentionally not changing the potential order of
any transforms yet.
llvm-svn: 356566
diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index 44f1709..68bab28 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -6876,6 +6876,7 @@
if (InsertedInsts.count(I))
return false;
+ // TODO: Move into the switch on opcode below here.
if (PHINode *P = dyn_cast<PHINode>(I)) {
// It is possible for very late stage optimizations (such as SimplifyCFG)
// to introduce PHI nodes too late to be cleaned up. If we detect such a
@@ -6994,20 +6995,18 @@
if (tryToSinkFreeOperands(I))
return true;
- if (CallInst *CI = dyn_cast<CallInst>(I))
- return optimizeCallInst(CI, ModifiedDT);
-
- if (SelectInst *SI = dyn_cast<SelectInst>(I))
- return optimizeSelectInst(SI, ModifiedDT);
-
- if (ShuffleVectorInst *SVI = dyn_cast<ShuffleVectorInst>(I))
- return optimizeShuffleVectorInst(SVI);
-
- if (auto *Switch = dyn_cast<SwitchInst>(I))
- return optimizeSwitchInst(Switch);
-
- if (isa<ExtractElementInst>(I))
- return optimizeExtractElementInst(I);
+ switch (I->getOpcode()) {
+ case Instruction::Call:
+ return optimizeCallInst(cast<CallInst>(I), ModifiedDT);
+ case Instruction::Select:
+ return optimizeSelectInst(cast<SelectInst>(I), ModifiedDT);
+ case Instruction::ShuffleVector:
+ return optimizeShuffleVectorInst(cast<ShuffleVectorInst>(I));
+ case Instruction::Switch:
+ return optimizeSwitchInst(cast<SwitchInst>(I));
+ case Instruction::ExtractElement:
+ return optimizeExtractElementInst(cast<ExtractElementInst>(I));
+ }
return false;
}