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Revert 141203. InstCombine is looping on unit tests.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141209 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2011-10-05 20:44:29 +00:00
parent d2ed2d71c9
commit e2999b4899
2 changed files with 10 additions and 11 deletions
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17
lib/Transforms/InstCombine/InstructionCombining.cpp
View File

@ -2009,18 +2009,21 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
++NumCombined; ++NumCombined;
// Should we replace the old instruction with a new one? // Should we replace the old instruction with a new one?
if (Result != I) { if (Result != I) {
DEBUG(errs() << "IC: Old = " << *I << '\n'
<< " New = " << *Result << '\n');
if (!I->getDebugLoc().isUnknown()) if (!I->getDebugLoc().isUnknown())
Result->setDebugLoc(I->getDebugLoc()); Result->setDebugLoc(I->getDebugLoc());
// Everything uses the new instruction now. // Everything uses the new instruction now.
I->replaceAllUsesWith(Result); I->replaceAllUsesWith(Result);
// Move the name to the new instruction. // Push the new instruction and any users onto the worklist.
Worklist.Add(Result);
Worklist.AddUsersToWorkList(*Result);
// Move the name to the new instruction first.
Result->takeName(I); Result->takeName(I);
DEBUG(errs() << "IC: Old = " << *I << '\n'
<< " New = " << *Result << '\n');
// Insert the new instruction into the basic block... // Insert the new instruction into the basic block...
BasicBlock *InstParent = I->getParent(); BasicBlock *InstParent = I->getParent();
BasicBlock::iterator InsertPos = I; BasicBlock::iterator InsertPos = I;
@ -2032,10 +2035,6 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
InstParent->getInstList().insert(InsertPos, Result); InstParent->getInstList().insert(InsertPos, Result);
EraseInstFromFunction(*I); EraseInstFromFunction(*I);
// Push the new instruction and any users onto the worklist.
Worklist.Add(Result);
Worklist.AddUsersToWorkList(*Result);
} else { } else {
#ifndef NDEBUG #ifndef NDEBUG
DEBUG(errs() << "IC: Mod = " << OrigI << '\n' DEBUG(errs() << "IC: Mod = " << OrigI << '\n'

4
test/Transforms/InstCombine/2010-11-01-lshr-mask.ll
View File

@ -5,8 +5,8 @@
define i32 @main(i32 %argc) nounwind ssp { define i32 @main(i32 %argc) nounwind ssp {
entry: entry:
%tmp3151 = trunc i32 %argc to i8 %tmp3151 = trunc i32 %argc to i8
; CHECK: %0 = shl i8 %tmp3151, 5 ; CHECK: %tmp3162 = shl i8 %tmp3151, 5
; CHECK: and i8 %0, 64 ; CHECK: and i8 %tmp3162, 64
; CHECK-NOT: shl ; CHECK-NOT: shl
; CHECK-NOT: shr ; CHECK-NOT: shr
%tmp3161 = or i8 %tmp3151, -17 %tmp3161 = or i8 %tmp3151, -17