[llvm] r206542 - PMBuilder: Expose an option to disable tail calls

[Duncan P. N. Exon Smith]

Author: dexonsmith
Date: Thu Apr 17 20:05:15 2014
New Revision: 206542

URL: http://llvm.org/viewvc/llvm-project?rev=206542&view=rev
Log:
PMBuilder: Expose an option to disable tail calls

Adds API to allow frontends to disable tail calls in PassManagerBuilder.

<rdar://problem/16050591>

Modified:
    llvm/trunk/include/llvm/Transforms/IPO/PassManagerBuilder.h
    llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp

Modified: llvm/trunk/include/llvm/Transforms/IPO/PassManagerBuilder.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Transforms/IPO/PassManagerBuilder.h?rev=206542&r1=206541&r2=206542&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Transforms/IPO/PassManagerBuilder.h (original)
+++ llvm/trunk/include/llvm/Transforms/IPO/PassManagerBuilder.h Thu Apr 17 20:05:15 2014
@@ -106,6 +106,7 @@ public:
   /// added to the per-module passes.
   Pass *Inliner;
 
+  bool DisableTailCalls;
   bool DisableUnitAtATime;
   bool DisableUnrollLoops;
   bool BBVectorize;

Modified: llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp?rev=206542&r1=206541&r2=206542&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp (original)
+++ llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp Thu Apr 17 20:05:15 2014
@@ -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::populateModuleP
   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