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Before deleting a basic block, give other loop passes a chance cleanup analysis values, related to the instructions in the basic block.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67719 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2009-03-25 23:57:48 +00:00
parent 54f302272c
commit 575ec806e0
3 changed files with 47 additions and 1 deletions
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7
lib/Analysis/LoopPass.cpp
View File

@ -152,6 +152,13 @@ void LPPassManager::cloneBasicBlockSimpleAnalysis(BasicBlock *From,
/// deleteSimpleAnalysisValue - Invoke deleteAnalysisValue hook for all passes.
void LPPassManager::deleteSimpleAnalysisValue(Value *V, Loop *L) {
if (BasicBlock *BB = dyn_cast<BasicBlock>(V)) {
for (BasicBlock::iterator BI = BB->begin(), BE = BB->end(); BI != BE;
++BI) {
Instruction &I = *BI;
deleteSimpleAnalysisValue(&I, L);
}
}
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
Pass *P = getContainedPass(Index);
LoopPass *LP = dynamic_cast<LoopPass *>(P);

2
lib/Transforms/Scalar/LoopIndexSplit.cpp
View File

@ -673,6 +673,7 @@ void LoopIndexSplit::removeBlocks(BasicBlock *DeadBB, Loop *LP,
while (!WorkList.empty()) {
BasicBlock *BB = WorkList.back(); WorkList.pop_back();
LPM->deleteSimpleAnalysisValue(BB, LP);
for(BasicBlock::iterator BBI = BB->begin(), BBE = BB->end();
BBI != BBE; ) {
Instruction *I = BBI;
@ -680,7 +681,6 @@ void LoopIndexSplit::removeBlocks(BasicBlock *DeadBB, Loop *LP,
I->replaceAllUsesWith(UndefValue::get(I->getType()));
I->eraseFromParent();
}
LPM->deleteSimpleAnalysisValue(BB, LP);
DT->eraseNode(BB);
DF->removeBlock(BB);
LI->removeBlock(BB);

39
test/Transforms/LICM/2009-03-25-AliasSetTracker.ll Normal file
View File

@ -0,0 +1,39 @@
; RUN: llvm-as < %s | opt -licm -loop-index-split -instcombine -disable-output
%struct.FILE = type { i32, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, %struct._IO_marker*, %struct.FILE*, i32, i32, i32, i16, i8, [1 x i8], i8*, i64, i8*, i8*, i8*, i8*, i32, i32, [40 x i8] }
%struct._IO_marker = type { %struct._IO_marker*, %struct.FILE*, i32 }
@"\01LC81" = external constant [4 x i8] ; <[4 x i8]*> [#uses=1]
define fastcc void @hex_dump_internal(i8* %avcl, %struct.FILE* %f, i32 %level, i8* nocapture %buf, i32 %size) nounwind {
entry:
br i1 false, label %bb4, label %return
bb4: ; preds = %bb30, %entry
br label %bb6
bb6: ; preds = %bb15, %bb4
%j.0.reg2mem.0 = phi i32 [ %2, %bb15 ], [ 0, %bb4 ] ; <i32> [#uses=2]
%0 = icmp slt i32 %j.0.reg2mem.0, 0 ; <i1> [#uses=1]
br i1 %0, label %bb7, label %bb13
bb7: ; preds = %bb6
br label %bb15
bb13: ; preds = %bb6
%1 = tail call i32 @fwrite(i8* getelementptr ([4 x i8]* @"\01LC81", i32 0, i32 0), i32 1, i32 3, i8* null) nounwind ; <i32> [#uses=0]
br label %bb15
bb15: ; preds = %bb13, %bb7
%2 = add i32 %j.0.reg2mem.0, 1 ; <i32> [#uses=2]
%3 = icmp sgt i32 %2, 15 ; <i1> [#uses=1]
br i1 %3, label %bb30, label %bb6
bb30: ; preds = %bb15
br i1 false, label %bb4, label %return
return: ; preds = %bb30, %entry
ret void
}
declare i32 @fwrite(i8* nocapture, i32, i32, i8* nocapture) nounwind