[llvm-commits] [llvm] r108865 - /llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp

[Dan Gohman]

Author: djg
Date: Tue Jul 20 12:18:52 2010
New Revision: 108865

URL: http://llvm.org/viewvc/llvm-project?rev=108865&view=rev
Log:
Remember that the induction variable is always a PHINode and
use getIncomingValueForBlock instead of
LoopInfo::getCanonicalInductionVariableIncrement.

Modified:
    llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp

Modified: llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp?rev=108865&r1=108864&r2=108865&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp Tue Jul 20 12:18:52 2010
@@ -102,7 +102,7 @@
     void RewriteNonIntegerIVs(Loop *L);
 
     ICmpInst *LinearFunctionTestReplace(Loop *L, const SCEV *BackedgeTakenCount,
-                                   Value *IndVar,
+                                   PHINode *IndVar,
                                    BasicBlock *ExitingBlock,
                                    BranchInst *BI,
                                    SCEVExpander &Rewriter);
@@ -131,7 +131,7 @@
 /// is actually a much broader range than just linear tests.
 ICmpInst *IndVarSimplify::LinearFunctionTestReplace(Loop *L,
                                    const SCEV *BackedgeTakenCount,
-                                   Value *IndVar,
+                                   PHINode *IndVar,
                                    BasicBlock *ExitingBlock,
                                    BranchInst *BI,
                                    SCEVExpander &Rewriter) {
@@ -181,7 +181,7 @@
     // The BackedgeTaken expression contains the number of times that the
     // backedge branches to the loop header.  This is one less than the
     // number of times the loop executes, so use the incremented indvar.
-    CmpIndVar = L->getCanonicalInductionVariableIncrement();
+    CmpIndVar = IndVar->getIncomingValueForBlock(ExitingBlock);
   } else {
     // We have to use the preincremented value...
     RHS = SE->getTruncateOrZeroExtend(BackedgeTakenCount,
@@ -534,7 +534,7 @@
 
   // Now that we know the largest of the induction variable expressions
   // in this loop, insert a canonical induction variable of the largest size.
-  Value *IndVar = 0;
+  PHINode *IndVar = 0;
   if (NeedCannIV) {
     // Check to see if the loop already has any canonical-looking induction
     // variables. If any are present and wider than the planned canonical