[PowerPC] Enable machine verification for 3 passes

Summary:
For PowerPC, there are 3 passes has disabled the machine verification.
```
PPCTargetMachine.cpp:    addPass(&LiveVariablesID, false);
PPCTargetMachine.cpp:    addPass(createPPCEarlyReturnPass(), false);
PPCTargetMachine.cpp:  addPass(createPPCBranchSelectionPass(), false);
```
This patch is to enable machine verification for above three passes.

Reviewed By: steven.zhang

Differential Revision: https://reviews.llvm.org/D79840

diff --git a/llvm/lib/Target/PowerPC/PPCTargetMachine.cpp b/llvm/lib/Target/PowerPC/PPCTargetMachine.cpp
index 5e5df91..f15f9c7 100644 (file)
--- a/llvm/lib/Target/PowerPC/PPCTargetMachine.cpp
+++ b/llvm/lib/Target/PowerPC/PPCTargetMachine.cpp
@@ -504,7 +504,7 @@ void PPCPassConfig::addPreRegAlloc() {
     // PPCTLSDynamicCallPass uses LiveIntervals which previously dependent on
     // LiveVariables. This (unnecessary) dependency has been removed now,
     // however a stage-2 clang build fails without LiveVariables computed here.
-    addPass(&LiveVariablesID, false);
+    addPass(&LiveVariablesID);
     addPass(createPPCTLSDynamicCallPass());
   }
   if (EnableExtraTOCRegDeps)
@@ -531,9 +531,9 @@ void PPCPassConfig::addPreEmitPass() {
   addPass(createPPCExpandISELPass());
 
   if (getOptLevel() != CodeGenOpt::None)
-    addPass(createPPCEarlyReturnPass(), false);
+    addPass(createPPCEarlyReturnPass());
   // Must run branch selection immediately preceding the asm printer.
-  addPass(createPPCBranchSelectionPass(), false);
+  addPass(createPPCBranchSelectionPass());
 }
 
 TargetTransformInfo