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SelectionDAG: If llvm.donothing has a landingpad, we should clear

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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
This commit is contained in:
Manman Ren 2013-02-27 02:11:57 +00:00
parent 06df83c25a
commit 5e5974f51a
2 changed files with 47 additions and 0 deletions
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7
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
View File

@ -1872,6 +1872,13 @@ void SelectionDAGBuilder::visitInvoke(const InvokeInst &I) {
visitInlineAsm(&I);
else if (Fn && Fn->isIntrinsic()) {
assert(Fn->getIntrinsicID() == Intrinsic::donothing);
// If donothing has a landingpad, we should clear CurrentCallSite.
if (LandingPad) {
MachineModuleInfo &MMI = DAG.getMachineFunction().getMMI();
unsigned CallSiteIndex = MMI.getCurrentCallSite();
if (CallSiteIndex)
MMI.setCurrentCallSite(0);
}
// Ignore invokes to @llvm.donothing: jump directly to the next BB.
} else
LowerCallTo(&I, getValue(Callee), false, LandingPad);

40
test/CodeGen/ARM/invoke-donothing-assert.ll Normal file
View File

@ -0,0 +1,40 @@
; RUN: llc < %s -mtriple=armv7-apple-ios | FileCheck %s
; This testcase makes sure we can handle invoke @llvm.donothing without
; assertion failure.
; rdar://problem/13228754
; CHECK: .globl _main
declare void @callA()
declare i32 @__gxx_personality_sj0(...)
define void @main() {
invoke.cont:
invoke void @callA()
to label %invoke.cont25 unwind label %lpad2
invoke.cont25:
invoke void @llvm.donothing()
to label %invoke.cont27 unwind label %lpad15
invoke.cont27:
invoke void @callB()
to label %invoke.cont75 unwind label %lpad15
invoke.cont75:
ret void
lpad2:
%0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_sj0 to i8*)
cleanup
br label %eh.resume
lpad15:
%1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_sj0 to i8*)
cleanup
br label %eh.resume
eh.resume:
resume { i8*, i32 } zeroinitializer
}
declare void @callB()
declare void @llvm.donothing() nounwind readnone