From: Owen Anderson <resistor@mac.com>
Date: Fri, 30 May 2008 18:38:26 +0000 (+0000)
Subject: Preserve the register coallescer, and update live intervals more correctly by trigger... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3947e4d142c8a3fd958e62ace0a1333fb9e5a220;p=oota-llvm.git

Preserve the register coallescer, and update live intervals more correctly by triggering a renumbering after phi elimination.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51780 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/StrongPHIElimination.cpp b/lib/CodeGen/StrongPHIElimination.cpp
index 97e4fb9b6e7..449ef38a3a1 100644
--- a/lib/CodeGen/StrongPHIElimination.cpp
+++ b/lib/CodeGen/StrongPHIElimination.cpp
@@ -27,6 +27,7 @@
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/MachineLoopInfo.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/RegisterCoalescer.h"
 #include "llvm/Target/TargetInstrInfo.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/ADT/DepthFirstIterator.h"
@@ -34,7 +35,6 @@
 #include "llvm/Support/Compiler.h"
 using namespace llvm;
 
-
 namespace {
   struct VISIBILITY_HIDDEN StrongPHIElimination : public MachineFunctionPass {
     static char ID; // Pass identification, replacement for typeid
@@ -74,6 +74,7 @@ namespace {
       
       // TODO: Actually make this true.
       AU.addPreserved<LiveIntervals>();
+      AU.addPreserved<RegisterCoalescer>();
       MachineFunctionPass::getAnalysisUsage(AU);
     }
     
@@ -921,5 +922,7 @@ bool StrongPHIElimination::runOnMachineFunction(MachineFunction &Fn) {
     PInstr->eraseFromParent();
   }
   
+  LI.computeNumbering();
+  
   return true;
 }