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Fix PR3522. It's not safe to sink into landing pad BB's.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64582 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -212,6 +212,11 @@ bool MachineSinking::SinkInstruction(MachineInstr *MI, bool &SawStore) {
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// If there are no outputs, it must have side-effects.
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if (SuccToSinkTo == 0)
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return false;
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// It's not safe to sink instructions to EH landing pad. Control flow into
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// landing pad is implicitly defined.
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if (SuccToSinkTo->isLandingPad())
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return false;
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DEBUG(cerr << "Sink instr " << *MI);
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DEBUG(cerr << "to block " << *SuccToSinkTo);
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30
test/CodeGen/X86/pr3522.ll
Normal file
30
test/CodeGen/X86/pr3522.ll
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@ -0,0 +1,30 @@
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; RUN: llvm-as < %s | llc -march=x86 -stats |& not grep machine-sink
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; PR3522
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target triple = "i386-pc-linux-gnu"
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@.str = external constant [13 x i8] ; <[13 x i8]*> [#uses=1]
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define void @_ada_c34018a() {
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entry:
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%0 = tail call i32 @report__ident_int(i32 90) ; <i32> [#uses=1]
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%1 = trunc i32 %0 to i8 ; <i8> [#uses=1]
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invoke void @__gnat_rcheck_12(i8* getelementptr ([13 x i8]* @.str, i32 0, i32 0), i32 32) noreturn
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to label %invcont unwind label %lpad
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invcont: ; preds = %entry
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unreachable
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bb22: ; preds = %lpad
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ret void
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return: ; preds = %lpad
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ret void
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lpad: ; preds = %entry
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%2 = icmp eq i8 %1, 90 ; <i1> [#uses=1]
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br i1 %2, label %return, label %bb22
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}
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declare void @__gnat_rcheck_12(i8*, i32) noreturn
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declare i32 @report__ident_int(i32)
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