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authorChris Lattner <sabre@nondot.org>2002-12-07 18:42:13 +0000
committerChris Lattner <sabre@nondot.org>2002-12-07 18:42:13 +0000
commit342d1826fbbc2b8cd734e6cbc670744469986ff8 (patch)
tree8cc548d2e31ab8b68885e040af2e3a3ea8ad2740 /lib/Transforms
parent61eadb0255925c8ad74710c0694ac7d9639b3c30 (diff)
downloadexternal_llvm-342d1826fbbc2b8cd734e6cbc670744469986ff8.zip
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Remove dead code
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4952 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
-rw-r--r--lib/Transforms/Scalar/GCSE.cpp32
1 files changed, 0 insertions, 32 deletions
diff --git a/lib/Transforms/Scalar/GCSE.cpp b/lib/Transforms/Scalar/GCSE.cpp
index 771b969..dd8e139 100644
--- a/lib/Transforms/Scalar/GCSE.cpp
+++ b/lib/Transforms/Scalar/GCSE.cpp
@@ -25,9 +25,6 @@ namespace {
class GCSE : public FunctionPass {
std::set<Instruction*> WorkList;
DominatorSet *DomSetInfo;
-#if 0
- ImmediateDominators *ImmDominator;
-#endif
ValueNumbering *VN;
public:
virtual bool runOnFunction(Function &F);
@@ -61,9 +58,6 @@ bool GCSE::runOnFunction(Function &F) {
// Get pointers to the analysis results that we will be using...
DomSetInfo = &getAnalysis<DominatorSet>();
-#if 0
- ImmDominator = &getAnalysis<ImmediateDominators>();
-#endif
VN = &getAnalysis<ValueNumbering>();
// Step #1: Add all instructions in the function to the worklist for
@@ -254,32 +248,6 @@ Instruction *GCSE::EliminateCSE(Instruction *I, Instruction *Other) {
// PRE than GCSE.
//
return 0;
-
-#if 0
- // Handle the most general case now. In this case, neither I dom Other nor
- // Other dom I. Because we are in SSA form, we are guaranteed that the
- // operands of the two instructions both dominate the uses, so we _know_
- // that there must exist a block that dominates both instructions (if the
- // operands of the instructions are globals or constants, worst case we
- // would get the entry node of the function). Search for this block now.
- //
-
- // Search up the immediate dominator chain of BB1 for the shared dominator
- BasicBlock *SharedDom = (*ImmDominator)[BB1];
- while (!DomSetInfo->dominates(SharedDom, BB2))
- SharedDom = (*ImmDominator)[SharedDom];
-
- // At this point, shared dom must dominate BOTH BB1 and BB2...
- assert(SharedDom && DomSetInfo->dominates(SharedDom, BB1) &&
- DomSetInfo->dominates(SharedDom, BB2) && "Dominators broken!");
-
- // Rip 'I' out of BB1, and move it to the end of SharedDom.
- BB1->getInstList().remove(I);
- SharedDom->getInstList().insert(--SharedDom->end(), I);
-
- // Eliminate 'Other' now.
- ReplaceInstWithInst(I, Other);
-#endif
}
if (isa<LoadInst>(Ret))