From bf1d0f417eebbd25b85b4dac2e7d7a4cc7f45b7b Mon Sep 17 00:00:00 2001 From: "Duncan P. N. Exon Smith" Date: Fri, 18 Apr 2014 01:05:15 +0000 Subject: [PATCH] PMBuilder: Expose an option to disable tail calls Adds API to allow frontends to disable tail calls in PassManagerBuilder. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206542 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Transforms/IPO/PassManagerBuilder.h | 1 + lib/Transforms/IPO/PassManagerBuilder.cpp | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/include/llvm/Transforms/IPO/PassManagerBuilder.h b/include/llvm/Transforms/IPO/PassManagerBuilder.h index 42b6b27d0ce..bfd58f11756 100644 --- a/include/llvm/Transforms/IPO/PassManagerBuilder.h +++ b/include/llvm/Transforms/IPO/PassManagerBuilder.h @@ -106,6 +106,7 @@ public: /// added to the per-module passes. Pass *Inliner; + bool DisableTailCalls; bool DisableUnitAtATime; bool DisableUnrollLoops; bool BBVectorize; diff --git a/lib/Transforms/IPO/PassManagerBuilder.cpp b/lib/Transforms/IPO/PassManagerBuilder.cpp index 76f7c1098b0..052d24f58aa 100644 --- a/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -58,6 +58,7 @@ PassManagerBuilder::PassManagerBuilder() { SizeLevel = 0; LibraryInfo = 0; Inliner = 0; + DisableTailCalls = false; DisableUnitAtATime = false; DisableUnrollLoops = false; BBVectorize = RunBBVectorization; @@ -183,7 +184,8 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) { MPM.add(createCFGSimplificationPass()); // Merge & remove BBs MPM.add(createInstructionCombiningPass()); // Combine silly seq's - MPM.add(createTailCallEliminationPass()); // Eliminate tail calls + if (!DisableTailCalls) + MPM.add(createTailCallEliminationPass()); // Eliminate tail calls MPM.add(createCFGSimplificationPass()); // Merge & remove BBs MPM.add(createReassociatePass()); // Reassociate expressions MPM.add(createLoopRotatePass()); // Rotate Loop