[llvm-commits] [llvm] r112409 - in /llvm/trunk: include/llvm/Transforms/Utils/SSAUpdater.h lib/Transforms/Utils/SSAUpdater.cpp
Chris Lattner
sabre at nondot.org
Sat Aug 28 21:54:06 PDT 2010
Author: lattner
Date: Sat Aug 28 23:54:06 2010
New Revision: 112409
URL: http://llvm.org/viewvc/llvm-project?rev=112409&view=rev
Log:
implement SSAUpdater::RewriteUseAfterInsertions, a helpful form of RewriteUse.
Modified:
llvm/trunk/include/llvm/Transforms/Utils/SSAUpdater.h
llvm/trunk/lib/Transforms/Utils/SSAUpdater.cpp
Modified: llvm/trunk/include/llvm/Transforms/Utils/SSAUpdater.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Transforms/Utils/SSAUpdater.h?rev=112409&r1=112408&r2=112409&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Transforms/Utils/SSAUpdater.h (original)
+++ llvm/trunk/include/llvm/Transforms/Utils/SSAUpdater.h Sat Aug 28 23:54:06 2010
@@ -94,6 +94,12 @@
/// for the use's block will be considered to be below it.
void RewriteUse(Use &U);
+ /// RewriteUseAfterInsertions - Rewrite a use, just like RewriteUse. However,
+ /// this version of the method can rewrite uses in the same block as a
+ /// definition, because it assumes that all uses of a value are below any
+ /// inserted values.
+ void RewriteUseAfterInsertions(Use &U);
+
private:
Value *GetValueAtEndOfBlockInternal(BasicBlock *BB);
Modified: llvm/trunk/lib/Transforms/Utils/SSAUpdater.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/SSAUpdater.cpp?rev=112409&r1=112408&r2=112409&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Utils/SSAUpdater.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/SSAUpdater.cpp Sat Aug 28 23:54:06 2010
@@ -205,6 +205,22 @@
U.set(V);
}
+/// RewriteUseAfterInsertions - Rewrite a use, just like RewriteUse. However,
+/// this version of the method can rewrite uses in the same block as a
+/// definition, because it assumes that all uses of a value are below any
+/// inserted values.
+void SSAUpdater::RewriteUseAfterInsertions(Use &U) {
+ Instruction *User = cast<Instruction>(U.getUser());
+
+ Value *V;
+ if (PHINode *UserPN = dyn_cast<PHINode>(User))
+ V = GetValueAtEndOfBlock(UserPN->getIncomingBlock(U));
+ else
+ V = GetValueAtEndOfBlock(User->getParent());
+
+ U.set(V);
+}
+
/// PHIiter - Iterator for PHI operands. This is used for the PHI_iterator
/// in the SSAUpdaterImpl template.
namespace {
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