[Statepoint] Mark FixupStatepointCallerSaved as preserving the CFG

topperc · topperc · commit de92dc2850c1 · 2020-05-13T10:59:44.000-07:00
I'm hoping this will restore some compile time lost by D75936 and D75937. Differential Revision: https://reviews.llvm.org/D79813
diff --git a/llvm/lib/CodeGen/FixupStatepointCallerSaved.cpp b/llvm/lib/CodeGen/FixupStatepointCallerSaved.cpp
@@ -57,6 +57,7 @@ class FixupStatepointCallerSaved : public MachineFunctionPass {
   }
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.setPreservesCFG();
     MachineFunctionPass::getAnalysisUsage(AU);
   }
 
diff --git a/llvm/test/CodeGen/ARM/O3-pipeline.ll b/llvm/test/CodeGen/ARM/O3-pipeline.ll
@@ -128,9 +128,8 @@
 ; CHECK-NEXT:      Machine Loop Invariant Code Motion
 ; CHECK-NEXT:      Fixup Statepoint Caller Saved
 ; CHECK-NEXT:      PostRA Machine Sink
-; CHECK-NEXT:      MachineDominator Tree Construction
-; CHECK-NEXT:      Machine Natural Loop Construction
 ; CHECK-NEXT:      Machine Block Frequency Analysis
+; CHECK-NEXT:      MachineDominator Tree Construction
 ; CHECK-NEXT:      MachinePostDominator Tree Construction
 ; CHECK-NEXT:      Lazy Machine Block Frequency Analysis
 ; CHECK-NEXT:      Machine Optimization Remark Emitter
diff --git a/llvm/test/CodeGen/X86/O3-pipeline.ll b/llvm/test/CodeGen/X86/O3-pipeline.ll
@@ -146,8 +146,6 @@
 ; CHECK-NEXT:       X86 Load Value Injection (LVI) Load Hardening
 ; CHECK-NEXT:       Fixup Statepoint Caller Saved
 ; CHECK-NEXT:       PostRA Machine Sink
-; CHECK-NEXT:       MachineDominator Tree Construction
-; CHECK-NEXT:       Machine Natural Loop Construction
 ; CHECK-NEXT:       Machine Block Frequency Analysis
 ; CHECK-NEXT:       MachinePostDominator Tree Construction
 ; CHECK-NEXT:       Lazy Machine Block Frequency Analysis

Original file line number	Diff line number	Diff line change
`@@ -57,6 +57,7 @@ class FixupStatepointCallerSaved : public MachineFunctionPass {`
`57`	`57`	`}`
`58`	`58`
`59`	`59`	`void getAnalysisUsage(AnalysisUsage &AU) const override {`
	`60`	`+ AU.setPreservesCFG();`
`60`	`61`	`MachineFunctionPass::getAnalysisUsage(AU);`
`61`	`62`	`}`
`62`	`63`