contract-catchswitch.ll
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; RUN: opt -S -objc-arc-contract < %s | FileCheck %s
target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
target triple = "i686--windows-msvc19.11.0"
%0 = type opaque
declare i32 @__CxxFrameHandler3(...)
declare dllimport void @llvm.objc.release(i8*) local_unnamed_addr
declare dllimport i8* @llvm.objc.retain(i8* returned) local_unnamed_addr
@p = global i8* null, align 4
declare void @f() local_unnamed_addr
define void @g() local_unnamed_addr personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
entry:
%tmp = load i8*, i8** @p, align 4
%cast = bitcast i8* %tmp to %0*
%tmp1 = tail call i8* @llvm.objc.retain(i8* %tmp) #0
; Split the basic block to ensure bitcast ends up in entry.split.
br label %entry.split
entry.split:
invoke void @f()
to label %invoke.cont unwind label %catch.dispatch
; Dummy nested catchswitch to test looping through the dominator tree.
catch.dispatch:
%tmp2 = catchswitch within none [label %catch] unwind label %catch.dispatch1
catch:
%tmp3 = catchpad within %tmp2 [i8* null, i32 64, i8* null]
catchret from %tmp3 to label %invoke.cont
catch.dispatch1:
%tmp4 = catchswitch within none [label %catch1] unwind label %ehcleanup
catch1:
%tmp5 = catchpad within %tmp4 [i8 *null, i32 64, i8* null]
catchret from %tmp5 to label %invoke.cont
invoke.cont:
%tmp6 = load i8*, i8** @p, align 4
%cast1 = bitcast i8* %tmp6 to %0*
%tmp7 = tail call i8* @llvm.objc.retain(i8* %tmp6) #0
call void @llvm.objc.release(i8* %tmp) #0, !clang.imprecise_release !0
; Split the basic block to ensure bitcast ends up in invoke.cont.split.
br label %invoke.cont.split
invoke.cont.split:
invoke void @f()
to label %invoke.cont1 unwind label %ehcleanup
invoke.cont1:
ret void
ehcleanup:
%tmp8 = phi %0* [ %cast, %catch.dispatch1 ], [ %cast1, %invoke.cont.split ]
%tmp9 = cleanuppad within none []
%tmp10 = bitcast %0* %tmp8 to i8*
call void @llvm.objc.release(i8* %tmp10) #0 [ "funclet"(token %tmp9) ]
cleanupret from %tmp9 unwind to caller
}
; CHECK-LABEL: entry.split:
; CHECK-NEXT: %0 = bitcast i8* %tmp1 to %0*
; CHECK-NEXT: invoke void @f()
; CHECK-NEXT: to label %invoke.cont unwind label %catch.dispatch
; CHECK-LABEL: invoke.cont.split:
; CHECK-NEXT: %1 = bitcast i8* %tmp7 to %0*
; CHECK-NEXT: invoke void @f()
; CHECK-NEXT: to label %invoke.cont1 unwind label %ehcleanup
; CHECK-LABEL: ehcleanup:
; CHECK-NEXT: %tmp8 = phi %0* [ %0, %catch.dispatch1 ], [ %1, %invoke.cont.split ]
attributes #0 = { nounwind }
!0 = !{}