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Temporarily revert:
Log: Transform @llvm.objectsize to integer if the argument is a result of malloc of known size. Modified: llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp llvm/trunk/test/Transforms/InstCombine/objsize.ll It appears to be causing swb and nightly test failures. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97866 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -336,16 +336,6 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
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}
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return ReplaceInstUsesWith(CI, ConstantInt::get(ReturnTy, AllocaSize));
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}
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} else if (CallInst *MI = extractMallocCall(Op1)) {
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const Type* MallocType = getMallocAllocatedType(MI);
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// Get alloca size.
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if (MallocType->isSized()) {
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if (Value *NElems = getMallocArraySize(MI, TD, true)) {
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if (ConstantInt *NElements = dyn_cast<ConstantInt>(NElems))
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return ReplaceInstUsesWith(CI, ConstantInt::get(ReturnTy,
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(NElements->getZExtValue() * TD->getTypeAllocSize(MallocType))));
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}
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}
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} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Op1)) {
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// Only handle constant GEPs here.
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if (CE->getOpcode() != Instruction::GetElementPtr) break;
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@ -118,24 +118,8 @@ entry:
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ret i32 0
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}
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@s = external global i8*
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define void @test5(i32 %n) nounwind ssp {
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; CHECK: @test5
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entry:
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%0 = tail call noalias i8* @malloc(i32 20) nounwind
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%1 = tail call i32 @llvm.objectsize.i32(i8* %0, i1 false)
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%2 = load i8** @s, align 8
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; CHECK-NOT: @llvm.objectsize
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; CHECK: @__memcpy_chk(i8* %0, i8* %1, i32 10, i32 20)
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%3 = tail call i8* @__memcpy_chk(i8* %0, i8* %2, i32 10, i32 %1) nounwind
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ret void
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}
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declare i8* @__memset_chk(i8*, i32, i64, i64) nounwind
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declare noalias i8* @malloc(i32) nounwind
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declare i32 @llvm.objectsize.i32(i8*, i1) nounwind readonly
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declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readonly
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