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SelectionDAG: If llvm.donothing has a landingpad, we should clear
CurrentCallSite to avoid an assertion failure: assert(MMI.getCurrentCallSite() == 0 && "Overlapping call sites!"); rdar://problem/13228754 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176154 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1872,6 +1872,13 @@ void SelectionDAGBuilder::visitInvoke(const InvokeInst &I) {
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visitInlineAsm(&I);
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else if (Fn && Fn->isIntrinsic()) {
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assert(Fn->getIntrinsicID() == Intrinsic::donothing);
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// If donothing has a landingpad, we should clear CurrentCallSite.
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if (LandingPad) {
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MachineModuleInfo &MMI = DAG.getMachineFunction().getMMI();
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unsigned CallSiteIndex = MMI.getCurrentCallSite();
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if (CallSiteIndex)
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MMI.setCurrentCallSite(0);
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}
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// Ignore invokes to @llvm.donothing: jump directly to the next BB.
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} else
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LowerCallTo(&I, getValue(Callee), false, LandingPad);
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40
test/CodeGen/ARM/invoke-donothing-assert.ll
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40
test/CodeGen/ARM/invoke-donothing-assert.ll
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@ -0,0 +1,40 @@
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; RUN: llc < %s -mtriple=armv7-apple-ios | FileCheck %s
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; This testcase makes sure we can handle invoke @llvm.donothing without
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; assertion failure.
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; rdar://problem/13228754
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; CHECK: .globl _main
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declare void @callA()
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declare i32 @__gxx_personality_sj0(...)
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define void @main() {
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invoke.cont:
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invoke void @callA()
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to label %invoke.cont25 unwind label %lpad2
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invoke.cont25:
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invoke void @llvm.donothing()
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to label %invoke.cont27 unwind label %lpad15
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invoke.cont27:
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invoke void @callB()
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to label %invoke.cont75 unwind label %lpad15
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invoke.cont75:
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ret void
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lpad2:
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%0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_sj0 to i8*)
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cleanup
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br label %eh.resume
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lpad15:
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%1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_sj0 to i8*)
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cleanup
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br label %eh.resume
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eh.resume:
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resume { i8*, i32 } zeroinitializer
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}
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declare void @callB()
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declare void @llvm.donothing() nounwind readnone
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