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608538dccc
SimplifyCFG allows tail merging with code which terminates in unreachable which, in turn, makes it possible for an invoke to end up in a funclet which it was not originally part of. Using operand bundles on invokes allows us to determine whether or not an invoke was part of a funclet in the source program. Furthermore, it allows us to unambiguously answer questions about the legality of inlining into call sites which the personality may have trouble with. Differential Revision: http://reviews.llvm.org/D15517 llvm-svn: 255674
159 lines
4.4 KiB
LLVM
159 lines
4.4 KiB
LLVM
; RUN: llc -mtriple=x86_64-windows-msvc < %s | FileCheck %s
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc"
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%eh.ThrowInfo = type { i32, i32, i32, i32 }
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%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
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@"\01??_7type_info@@6B@" = external constant i8*
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@"\01??_R0H@8" = internal global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }
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define void @test1(i1 %B) personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @g()
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to label %unreachable unwind label %catch.dispatch
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catch.dispatch:
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%cs1 = catchswitch within none [label %catch] unwind to caller
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catch:
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%cp = catchpad within %cs1 [i8* null, i32 64, i8* null]
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br label %catch.loop
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catch.loop:
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br i1 %B, label %catchret, label %catch.loop
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catchret:
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catchret from %cp to label %try.cont
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try.cont:
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ret void
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unreachable:
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unreachable
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}
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; CHECK-LABEL: test1:
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; The entry funclet contains %entry and %try.cont
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; CHECK: # %entry
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; CHECK: # %try.cont
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; CHECK: retq
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; The catch funclet contains %catch and %catchret
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; CHECK: # %catch{{$}}
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; CHECK: # %catchret
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; CHECK: retq
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declare void @g()
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define i32 @test2(i1 %B) personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @_CxxThrowException(i8* null, %eh.ThrowInfo* null) #1
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to label %unreachable unwind label %catch.dispatch
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catch.dispatch: ; preds = %entry
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%cs1 = catchswitch within none [label %catch] unwind to caller
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catch: ; preds = %catch.dispatch
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%0 = catchpad within %cs1 [i8* null, i32 64, i8* null]
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invoke void @_CxxThrowException(i8* null, %eh.ThrowInfo* null) #1 ["funclet"(token %0)]
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to label %unreachable unwind label %catch.dispatch.1
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catch.dispatch.1: ; preds = %catch
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%cs2 = catchswitch within %0 [label %catch.3] unwind to caller
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catch.3: ; preds = %catch.dispatch.1
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%1 = catchpad within %cs2 [i8* null, i32 64, i8* null]
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catchret from %1 to label %try.cont
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try.cont: ; preds = %catch.3
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catchret from %0 to label %try.cont.5
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try.cont.5: ; preds = %try.cont
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ret i32 0
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unreachable: ; preds = %catch, %entry
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unreachable
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}
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; CHECK-LABEL: test2:
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; The parent function contains %entry and %try.cont.5
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; CHECK: .seh_proc
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; CHECK: # %entry
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; CHECK: # %try.cont.5
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; CHECK: retq
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; The inner catch funclet contains %catch.3
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; CHECK: .seh_proc
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; CHECK: # %catch.3{{$}}
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; CHECK: retq
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; The outer catch funclet contains %catch
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; CHECK: .seh_proc
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; CHECK: # %catch{{$}}
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; CHECK: callq _CxxThrowException
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; CHECK: # %unreachable
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; CHECK: ud2
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define void @test3(i1 %V) #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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entry:
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invoke void @g()
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to label %try.cont unwind label %catch.dispatch
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catch.dispatch: ; preds = %entry
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%cs1 = catchswitch within none [label %catch.2] unwind label %catch.dispatch.1
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catch.2: ; preds = %catch.dispatch
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%0 = catchpad within %cs1 [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i8* null]
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tail call void @exit(i32 0) #2 [ "funclet"(token %0) ]
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unreachable
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catch.dispatch.1: ; preds = %catch.dispatch
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%cs2 = catchswitch within none [label %catch] unwind to caller
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catch: ; preds = %catch.dispatch.1
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%1 = catchpad within %cs2 [i8* null, i32 64, i8* null]
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tail call void @exit(i32 0) #2 [ "funclet"(token %1) ]
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unreachable
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try.cont: ; preds = %entry
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br i1 %V, label %exit_one, label %exit_two
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exit_one:
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tail call void @exit(i32 0)
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unreachable
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exit_two:
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tail call void @exit(i32 0)
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unreachable
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}
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; CHECK-LABEL: test3:
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; The entry funclet contains %entry and %try.cont
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; CHECK: # %entry
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; CHECK: # %try.cont
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; CHECK: callq exit
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; CHECK-NOT: # exit_one
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; CHECK-NOT: # exit_two
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; CHECK: ud2
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; The catch(...) funclet contains %catch.2
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; CHECK: # %catch.2{{$}}
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; CHECK: callq exit
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; CHECK: ud2
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; The catch(int) funclet contains %catch
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; CHECK: # %catch{{$}}
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; CHECK: callq exit
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; CHECK: ud2
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declare void @exit(i32) noreturn nounwind
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declare void @_CxxThrowException(i8*, %eh.ThrowInfo*)
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declare i32 @__CxxFrameHandler3(...)
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