From f96ae684c4be9c08901bde63b0df8ef5210e6aff Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Tue, 4 Jan 2011 21:10:05 +0000
Subject: Turn the EdgeBundles class into a stand-alone machine CFG analysis
 pass.

The analysis will be needed by both the greedy register allocator and the
X86FloatingPoint pass. It only needs to be computed once when the CFG doesn't
change.

This pass is very fast, usually showing up as 0.0% wall time.

llvm-svn: 122832
---
 llvm/lib/Target/X86/X86FloatingPoint.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'llvm/lib/Target/X86/X86FloatingPoint.cpp')

diff --git a/llvm/lib/Target/X86/X86FloatingPoint.cpp b/llvm/lib/Target/X86/X86FloatingPoint.cpp
index 5da6d3a..873a4d9 100644
--- a/llvm/lib/Target/X86/X86FloatingPoint.cpp
+++ b/llvm/lib/Target/X86/X86FloatingPoint.cpp
@@ -32,6 +32,7 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/CodeGen/EdgeBundles.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
@@ -51,6 +52,7 @@ namespace {
   struct FPS : public MachineFunctionPass {
     static char ID;
     FPS() : MachineFunctionPass(ID) {
+      initializeEdgeBundlesPass(*PassRegistry::getPassRegistry());
       // This is really only to keep valgrind quiet.
       // The logic in isLive() is too much for it.
       memset(Stack, 0, sizeof(Stack));
@@ -59,6 +61,7 @@ namespace {
 
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
       AU.setPreservesCFG();
+      AU.addRequired<EdgeBundles>();
       AU.addPreservedID(MachineLoopInfoID);
       AU.addPreservedID(MachineDominatorsID);
       MachineFunctionPass::getAnalysisUsage(AU);
-- 
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