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8c7ceb2a0e
Code generation makes some basic assumptions about the IR it's been given. In particular, if there is only one 'invoke' in the function, then that invoke won't be going away. However, with the advent of the `llvm.donothing' intrinsic, those invokes may go away. If all of them go away, the landing pad no longer has any users. This confuses the back-end, which asserts. This happens with SjLj exceptions, because that's the model that modifies the IR based on there being invokes, etc. in the function. Remove any invokes of `llvm.donothing' during SjLj EH preparation. This will give us a CFG that the back-end won't be confused about. If all of the invokes in a function are removed, then the SjLj EH prepare pass won't insert the bogus code the relies upon the invokes being there. <rdar://problem/13228754&13316637> llvm-svn: 176677
74 lines
2.0 KiB
LLVM
74 lines
2.0 KiB
LLVM
; 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> & <rdar://problem/13316637>
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; CHECK: .globl _foo
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define void @foo() {
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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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; CHECK: .globl _bar
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define linkonce_odr void @bar(i32* %a) {
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if.end.i.i.i:
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invoke void @llvm.donothing()
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to label %call.i.i.i.noexc unwind label %eh.resume
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call.i.i.i.noexc:
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br i1 false, label %cleanup, label %new.notnull.i.i
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new.notnull.i.i:
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br label %cleanup
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cleanup:
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%0 = load i32* %a, align 4
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%inc294 = add nsw i32 %0, 4
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store i32 %inc294, i32* %a, align 4
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br i1 false, label %_ZN3lol5ArrayIivvvvvvvED1Ev.exit, label %delete.notnull.i.i.i1409
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delete.notnull.i.i.i1409:
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br label %_ZN3lol5ArrayIivvvvvvvED1Ev.exit
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_ZN3lol5ArrayIivvvvvvvED1Ev.exit:
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ret void
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eh.resume:
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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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%2 = extractvalue { i8*, i32 } %1, 0
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%3 = extractvalue { i8*, i32 } %1, 1
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%lpad.val = insertvalue { i8*, i32 } undef, i8* %2, 0
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%lpad.val395 = insertvalue { i8*, i32 } %lpad.val, i32 %3, 1
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resume { i8*, i32 } %lpad.val395
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}
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declare void @callA()
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declare void @callB()
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declare void @llvm.donothing() nounwind readnone
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declare i32 @__gxx_personality_sj0(...)
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