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The CatchObjOffset is relative to the end of the EH registration node for 32-bit x86 WinEH targets. A special sentinel value, 0, is used to indicate that no catch object should be initialized. This means that a catch object allocated immediately before the registration node would be assigned a CatchObjOffset of 0, leading the runtime to believe that a catch object should not be initialized. To handle this, allocate the registration node prior to any other frame object. This will ensure that catch objects will not be allocated before the registration node. This fixes PR26757. Differential Revision: http://reviews.llvm.org/D17689 llvm-svn: 262294
35 lines
798 B
LLVM
35 lines
798 B
LLVM
; RUN: llc < %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 = "i386-pc-windows-msvc"
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declare void @throw()
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define void @test1() personality i32 (...)* @__CxxFrameHandler3 {
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%e = alloca i8, align 4
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invoke void @throw()
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to label %.noexc unwind label %catch.dispatch
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.noexc:
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unreachable
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catch.object.Exception:
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%cp = catchpad within %cs [i8* null, i32 0, i8* %e]
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catchret from %cp to label %catchhandler
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catch.dispatch:
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%cs = catchswitch within none [label %catch.object.Exception] unwind to caller
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catchhandler:
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call void @use(i8* %e)
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ret void
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}
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; CHECK-LABEL: $handlerMap$0$test1:
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; CHECK: .long 0
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long -20
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declare void @use(i8*)
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declare i32 @__CxxFrameHandler3(...)
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