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29ae1c3d76
It is problematic if the inlinee has a cleanupret which unwinds to caller and we inline it into a call site which doesn't unwind. If the funclet unwinds anywhere other than to the caller, then we will give the funclet two unwind destinations. This will result in a verifier failure. Seeing as how the caller wasn't an invoke (which would locally unwind) and that the funclet cannot unwind to caller, we must conclude that an 'unwind to caller' cleanupret is dynamically unreachable. This fixes PR26698. Differential Revision: http://reviews.llvm.org/D17536 llvm-svn: 261656
66 lines
1.7 KiB
LLVM
66 lines
1.7 KiB
LLVM
; RUN: opt -S -inline < %s | FileCheck %s
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target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
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target triple = "i686-pc-windows-msvc18.0.0"
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declare void @g(i32)
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define void @f() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @g(i32 0)
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to label %invoke.cont unwind label %cs.bb
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invoke.cont:
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ret void
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cs.bb:
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%cs = catchswitch within none [label %cp.bb] unwind label %cleanup.bb
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cp.bb:
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%cpouter1 = catchpad within %cs [i8* null, i32 0, i8* null]
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call void @dtor() #1 [ "funclet"(token %cpouter1) ]
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catchret from %cpouter1 to label %invoke.cont
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cleanup.bb:
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%cpouter2 = cleanuppad within none []
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call void @g(i32 1) [ "funclet"(token %cpouter2) ]
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cleanupret from %cpouter2 unwind to caller
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}
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declare i32 @__CxxFrameHandler3(...)
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; Function Attrs: nounwind
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define internal void @dtor() #1 personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @g(i32 2)
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to label %invoke.cont unwind label %ehcleanup1
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invoke.cont:
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ret void
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ehcleanup1:
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%cpinner1 = cleanuppad within none []
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invoke void @g(i32 3) [ "funclet" (token %cpinner1) ]
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to label %done unwind label %ehcleanup2
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done:
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unreachable
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ehcleanup2:
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%cpinner2 = cleanuppad within %cpinner1 []
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call void @g(i32 4) [ "funclet" (token %cpinner2) ]
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cleanupret from %cpinner2 unwind to caller
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}
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; CHECK-LABEL: define void @f(
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; CHECK: %[[cs:.*]] = catchswitch within none
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; CHECK: %[[cpouter1:.*]] = catchpad within %[[cs]]
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; CHECK: %[[cpinner1:.*]] = cleanuppad within %[[cpouter1]]
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; CHECK: %[[cpinner2:.*]] = cleanuppad within %[[cpinner1]]
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; CHECK-NEXT: call void @g(i32 4) #0 [ "funclet"(token %[[cpinner2]]) ]
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; CHECK-NEXT: unreachable
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attributes #1 = { nounwind }
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