[NewPassManager] Run global dead code elimination after the inliner.

This is the same exact change we did for the current pass manager in rL314997, but the new pass manager pipeline already happened to run GlobalOpt after the inliner, so we just insert a run of GDCE here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315003 91177308-0d34-0410-b5e6-96231b3b80d8
marler8997 · Oct 5, 2017 · 6bfe1d9 · 6bfe1d9
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diff --git a/lib/Passes/PassBuilder.cpp b/lib/Passes/PassBuilder.cpp
@@ -670,6 +670,7 @@ PassBuilder::buildModuleOptimizationPipeline(OptimizationLevel Level,
 
   // Optimize globals now that the module is fully simplified.
   MPM.addPass(GlobalOptPass());
+  MPM.addPass(GlobalDCEPass());
 
   // Run partial inlining pass to partially inline functions that have
   // large bodies.

diff --git a/test/Other/new-pm-defaults.ll b/test/Other/new-pm-defaults.ll
@@ -179,6 +179,7 @@
 ; CHECK-O-NEXT: Running pass: PassManager<{{.*}}Module{{.*}}>
 ; CHECK-O-NEXT: Starting llvm::Module pass manager run.
 ; CHECK-O-NEXT: Running pass: GlobalOptPass
+; CHECK-O-NEXT: Running pass: GlobalDCEPass
 ; CHECK-O-NEXT: Running pass: EliminateAvailableExternallyPass
 ; CHECK-O-NEXT: Running pass: ReversePostOrderFunctionAttrsPass
 ; CHECK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}GlobalsAA

diff --git a/test/Other/new-pm-thinlto-defaults.ll b/test/Other/new-pm-thinlto-defaults.ll
@@ -168,6 +168,7 @@
 ; CHECK-POSTLINK-O-NEXT: Running pass: PassManager<{{.*}}Module{{.*}}>
 ; CHECK-POSTLINK-O-NEXT: Starting llvm::Module pass manager run.
 ; CHECK-POSTLINK-O-NEXT: Running pass: GlobalOptPass
+; CHECK-POSTLINK-O-NEXT: Running pass: GlobalDCEPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: EliminateAvailableExternallyPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: ReversePostOrderFunctionAttrsPass
 ; CHECK-POSTLINK-O-NEXT: Running pass: RequireAnalysisPass<{{.*}}GlobalsAA