From bccfc24c4e8092e1ee18746dd4cee01247728faa Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Thu, 3 Sep 2009 15:34:35 +0000
Subject: Change PHINode::hasConstantValue to have a DominatorTree argument
 instead of a bool argument, and to do the dominator check itself. This makes
 it eaiser to use when DominatorTree information is available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80920 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Utils/PromoteMemoryToRegister.cpp | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

(limited to 'lib/Transforms/Utils/PromoteMemoryToRegister.cpp')

diff --git a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
index 6a56a8d824..8274e5aeb6 100644
--- a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
+++ b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
@@ -494,17 +494,14 @@ void PromoteMem2Reg::run() {
       PHINode *PN = I->second;
       
       // If this PHI node merges one value and/or undefs, get the value.
-      if (Value *V = PN->hasConstantValue(true)) {
-        if (!isa<Instruction>(V) ||
-            properlyDominates(cast<Instruction>(V), PN)) {
-          if (AST && isa<PointerType>(PN->getType()))
-            AST->deleteValue(PN);
-          PN->replaceAllUsesWith(V);
-          PN->eraseFromParent();
-          NewPhiNodes.erase(I++);
-          EliminatedAPHI = true;
-          continue;
-        }
+      if (Value *V = PN->hasConstantValue(&DT)) {
+        if (AST && isa<PointerType>(PN->getType()))
+          AST->deleteValue(PN);
+        PN->replaceAllUsesWith(V);
+        PN->eraseFromParent();
+        NewPhiNodes.erase(I++);
+        EliminatedAPHI = true;
+        continue;
       }
       ++I;
     }
-- 
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