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Fix a silly mistake (which trips over an assertion) in r132099. rdar://9515076
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132194 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1981,6 +1981,8 @@ bool ARMFastISel::SelectIntCast(const Instruction *I) {
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unsigned Opc;
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bool isZext = isa<ZExtInst>(I);
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bool isBoolZext = false;
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if (!SrcVT.isSimple())
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return false;
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switch (SrcVT.getSimpleVT().SimpleTy) {
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default: return false;
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case MVT::i16:
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@ -372,7 +372,11 @@ bool LICM::canSinkOrHoistInst(Instruction &I) {
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return !pointerInvalidatedByLoop(LI->getOperand(0), Size,
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LI->getMetadata(LLVMContext::MD_tbaa));
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} else if (CallInst *CI = dyn_cast<CallInst>(&I)) {
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// Handle obvious cases efficiently.
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// Don't sink or hoist dbg info; it's legal, but not useful.
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if (isa<DbgInfoIntrinsic>(I))
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return false;
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// Handle simple cases by querying alias analysis.
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AliasAnalysis::ModRefBehavior Behavior = AA->getModRefBehavior(CI);
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if (Behavior == AliasAnalysis::DoesNotAccessMemory)
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return true;
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@ -522,14 +526,7 @@ void LICM::sink(Instruction &I) {
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SSA.AddAvailableValue(ExitBlock, New);
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}
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// If the instruction doesn't dominate any exit blocks, it must be dead.
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if (NumInserted == 0) {
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CurAST->deleteValue(&I);
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if (!I.use_empty())
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I.replaceAllUsesWith(UndefValue::get(I.getType()));
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I.eraseFromParent();
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return;
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}
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assert(NumInserted && "We shouldn't see dead instructions here!");
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// Next, rewrite uses of the instruction, inserting PHI nodes as needed.
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for (Value::use_iterator UI = I.use_begin(), UE = I.use_end(); UI != UE; ) {
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9
test/CodeGen/ARM/fast-isel-crash2.ll
Normal file
9
test/CodeGen/ARM/fast-isel-crash2.ll
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@ -0,0 +1,9 @@
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; RUN: llc < %s -O0 -mtriple=thumbv7-apple-darwin
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; rdar://9515076
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; (Make sure this doesn't crash.)
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define i32 @test(i32 %i) {
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%t = trunc i32 %1 to i4
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%r = sext i4 %t to i32
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ret i32 %r
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}
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