mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-10 06:54:54 +00:00
1dd94bbfa1
pad, separating the exception and selector calls from the new lpad. Teaching it not to do that, or to properly adjust the CFG afterwards, is out of scope because it would require the other edges to the landing pad to be split as well (effectively). Instead, just recover from the most likely cases during inlining. The best long-term solution is to change the exception representation and commit to either requiring or not requiring the more complex edge-splitting logic; this is just a shorter-term hack. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132799 91177308-0d34-0410-b5e6-96231b3b80d8
337 lines
12 KiB
LLVM
337 lines
12 KiB
LLVM
; RUN: opt < %s -inline -S | FileCheck %s
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; Test that the inliner correctly handles inlining into invoke sites
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; by appending selectors and forwarding _Unwind_Resume directly to the
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; enclosing landing pad.
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;; Test 0 - basic functionality.
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%struct.A = type { i8 }
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@_ZTIi = external constant i8*
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declare void @_ZN1AC1Ev(%struct.A*)
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declare void @_ZN1AD1Ev(%struct.A*)
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declare void @use(i32) nounwind
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declare void @opaque()
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declare i8* @llvm.eh.exception() nounwind readonly
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declare i32 @llvm.eh.selector(i8*, i8*, ...) nounwind
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declare i32 @llvm.eh.typeid.for(i8*) nounwind
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declare void @llvm.eh.resume(i8*, i32)
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declare i32 @__gxx_personality_v0(...)
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declare i8* @__cxa_begin_catch(i8*)
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declare void @__cxa_end_catch()
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declare void @_ZSt9terminatev()
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define internal void @test0_in() alwaysinline uwtable ssp {
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entry:
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%a = alloca %struct.A, align 1
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%b = alloca %struct.A, align 1
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call void @_ZN1AC1Ev(%struct.A* %a)
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invoke void @_ZN1AC1Ev(%struct.A* %b)
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to label %invoke.cont unwind label %lpad
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invoke.cont:
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invoke void @_ZN1AD1Ev(%struct.A* %b)
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to label %invoke.cont1 unwind label %lpad
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invoke.cont1:
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call void @_ZN1AD1Ev(%struct.A* %a)
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ret void
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lpad:
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%exn = call i8* @llvm.eh.exception() nounwind
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%eh.selector = call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* %exn, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i32 0) nounwind
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invoke void @_ZN1AD1Ev(%struct.A* %a)
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to label %invoke.cont2 unwind label %terminate.lpad
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invoke.cont2:
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call void @llvm.eh.resume(i8* %exn, i32 %eh.selector) noreturn
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unreachable
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terminate.lpad:
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%exn3 = call i8* @llvm.eh.exception() nounwind
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%eh.selector4 = call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* %exn3, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* null) nounwind
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call void @_ZSt9terminatev() noreturn nounwind
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unreachable
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}
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define void @test0_out() uwtable ssp {
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entry:
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invoke void @test0_in()
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to label %ret unwind label %lpad
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ret:
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ret void
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lpad: ; preds = %entry
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%exn = call i8* @llvm.eh.exception() nounwind
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%eh.selector = call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* %exn, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* bitcast (i8** @_ZTIi to i8*)) nounwind
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%0 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) nounwind
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%1 = icmp eq i32 %eh.selector, %0
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br i1 %1, label %catch, label %eh.resume
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catch:
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%ignored = call i8* @__cxa_begin_catch(i8* %exn) nounwind
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call void @__cxa_end_catch() nounwind
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br label %ret
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eh.resume:
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call void @llvm.eh.resume(i8* %exn, i32 %eh.selector) noreturn
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unreachable
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}
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; CHECK: define void @test0_out()
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; CHECK: [[A:%.*]] = alloca %struct.A,
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; CHECK: [[B:%.*]] = alloca %struct.A,
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; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A]])
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; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B]])
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; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B]])
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; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A]])
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; CHECK: call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* {{%.*}}, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i32 0, i8* bitcast (i8** @_ZTIi to i8*))
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; CHECK-NEXT: invoke void @_ZN1AD1Ev(%struct.A* [[A]])
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; CHECK-NEXT: to label %[[LBL:[^\s]+]] unwind
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; CHECK: [[LBL]]:
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; CHECK-NEXT: br label %[[LPAD:[^\s]+]]
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; CHECK: ret void
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; CHECK: call i8* @llvm.eh.exception()
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; CHECK-NEXT: call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* {{%.*}}, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* bitcast (i8** @_ZTIi to i8*))
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; CHECK-NEXT: br label %[[LPAD]]
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; CHECK: [[LPAD]]:
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; CHECK-NEXT: phi i8* [
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; CHECK-NEXT: phi i32 [
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; CHECK-NEXT: call i32 @llvm.eh.typeid.for(
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;; Test 1 - Correctly handle phis in outer landing pads.
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define void @test1_out() uwtable ssp {
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entry:
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invoke void @test0_in()
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to label %cont unwind label %lpad
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cont:
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invoke void @test0_in()
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to label %ret unwind label %lpad
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ret:
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ret void
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lpad:
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%x = phi i32 [ 0, %entry ], [ 1, %cont ]
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%y = phi i32 [ 1, %entry ], [ 4, %cont ]
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%exn = call i8* @llvm.eh.exception() nounwind
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%eh.selector = call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* %exn, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* bitcast (i8** @_ZTIi to i8*)) nounwind
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%0 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) nounwind
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%1 = icmp eq i32 %eh.selector, %0
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br i1 %1, label %catch, label %eh.resume
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catch:
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%ignored = call i8* @__cxa_begin_catch(i8* %exn) nounwind
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call void @use(i32 %x)
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call void @use(i32 %y)
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call void @__cxa_end_catch() nounwind
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br label %ret
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eh.resume:
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call void @llvm.eh.resume(i8* %exn, i32 %eh.selector) noreturn
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unreachable
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}
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; CHECK: define void @test1_out()
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; CHECK: [[A2:%.*]] = alloca %struct.A,
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; CHECK: [[B2:%.*]] = alloca %struct.A,
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; CHECK: [[A1:%.*]] = alloca %struct.A,
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; CHECK: [[B1:%.*]] = alloca %struct.A,
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; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A1]])
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; CHECK-NEXT: unwind label %[[LPAD:[^\s]+]]
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; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B1]])
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; CHECK-NEXT: unwind label %[[LPAD1:[^\s]+]]
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; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B1]])
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; CHECK-NEXT: unwind label %[[LPAD1]]
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; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A1]])
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; CHECK-NEXT: unwind label %[[LPAD]]
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; Inner landing pad from first inlining.
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; CHECK: [[LPAD1]]:
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; CHECK-NEXT: [[EXN1:%.*]] = call i8* @llvm.eh.exception()
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; CHECK-NEXT: [[SEL1:%.*]] = call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* [[EXN1]], i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i32 0, i8* bitcast (i8** @_ZTIi to i8*))
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; CHECK-NEXT: invoke void @_ZN1AD1Ev(%struct.A* [[A1]])
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; CHECK-NEXT: to label %[[RESUME1:[^\s]+]] unwind
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; CHECK: [[RESUME1]]:
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; CHECK-NEXT: br label %[[LPAD_JOIN1:[^\s]+]]
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; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A2]])
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; CHECK-NEXT: unwind label %[[LPAD]]
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; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B2]])
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; CHECK-NEXT: unwind label %[[LPAD2:[^\s]+]]
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; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B2]])
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; CHECK-NEXT: unwind label %[[LPAD2]]
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; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A2]])
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; CHECK-NEXT: unwind label %[[LPAD]]
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; Inner landing pad from second inlining.
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; CHECK: [[LPAD2]]:
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; CHECK-NEXT: [[EXN2:%.*]] = call i8* @llvm.eh.exception()
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; CHECK-NEXT: [[SEL2:%.*]] = call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* [[EXN2]], i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i32 0, i8* bitcast (i8** @_ZTIi to i8*))
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; CHECK-NEXT: invoke void @_ZN1AD1Ev(%struct.A* [[A2]])
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; CHECK-NEXT: to label %[[RESUME2:[^\s]+]] unwind
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; CHECK: [[RESUME2]]:
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; CHECK-NEXT: br label %[[LPAD_JOIN2:[^\s]+]]
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; CHECK: ret void
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; CHECK: [[LPAD]]:
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; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, %entry ], [ 0, {{%.*}} ], [ 1, %cont ], [ 1, {{%.*}} ]
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; CHECK-NEXT: [[Y:%.*]] = phi i32 [ 1, %entry ], [ 1, {{%.*}} ], [ 4, %cont ], [ 4, {{%.*}} ]
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; CHECK-NEXT: [[EXN:%.*]] = call i8* @llvm.eh.exception()
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; CHECK-NEXT: [[SEL:%.*]] = call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* [[EXN]], i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* bitcast (i8** @_ZTIi to i8*))
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; CHECK-NEXT: br label %[[LPAD_JOIN2]]
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; CHECK: [[LPAD_JOIN2]]:
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; CHECK-NEXT: [[XJ2:%.*]] = phi i32 [ [[X]], %[[LPAD]] ], [ 1, %[[RESUME2]] ]
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; CHECK-NEXT: [[YJ2:%.*]] = phi i32 [ [[Y]], %[[LPAD]] ], [ 4, %[[RESUME2]] ]
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; CHECK-NEXT: [[EXNJ2:%.*]] = phi i8* [ [[EXN]], %[[LPAD]] ], [ [[EXN2]], %[[RESUME2]] ]
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; CHECK-NEXT: [[SELJ2:%.*]] = phi i32 [ [[SEL]], %[[LPAD]] ], [ [[SEL2]], %[[RESUME2]] ]
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; CHECK-NEXT: br label %[[LPAD_JOIN1]]
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; CHECK: [[LPAD_JOIN1]]:
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; CHECK-NEXT: [[XJ1:%.*]] = phi i32 [ [[XJ2]], %[[LPAD_JOIN2]] ], [ 0, %[[RESUME1]] ]
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; CHECK-NEXT: [[YJ1:%.*]] = phi i32 [ [[YJ2]], %[[LPAD_JOIN2]] ], [ 1, %[[RESUME1]] ]
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; CHECK-NEXT: [[EXNJ1:%.*]] = phi i8* [ [[EXNJ2]], %[[LPAD_JOIN2]] ], [ [[EXN1]], %[[RESUME1]] ]
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; CHECK-NEXT: [[SELJ1:%.*]] = phi i32 [ [[SELJ2]], %[[LPAD_JOIN2]] ], [ [[SEL1]], %[[RESUME1]] ]
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; CHECK-NEXT: [[T:%.*]] = call i32 @llvm.eh.typeid.for(
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; CHECK-NEXT: icmp eq i32 [[SELJ1]], [[T]]
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; CHECK: call void @use(i32 [[XJ1]])
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; CHECK: call void @use(i32 [[YJ1]])
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; CHECK: call void @llvm.eh.resume(i8* [[EXNJ1]], i32 [[SELJ1]])
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;; Test 2 - Don't make invalid IR for inlines into landing pads without eh.exception calls
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define void @test2_out() uwtable ssp {
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entry:
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invoke void @test0_in()
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to label %ret unwind label %lpad
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ret:
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ret void
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lpad:
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call void @_ZSt9terminatev()
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unreachable
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}
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; CHECK: define void @test2_out()
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; CHECK: [[A:%.*]] = alloca %struct.A,
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; CHECK: [[B:%.*]] = alloca %struct.A,
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; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A]])
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; CHECK-NEXT: unwind label %[[LPAD:[^\s]+]]
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; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B]])
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; CHECK-NEXT: unwind label %[[LPAD2:[^\s]+]]
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; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B]])
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; CHECK-NEXT: unwind label %[[LPAD2]]
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; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A]])
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; CHECK-NEXT: unwind label %[[LPAD]]
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;; Test 3 - Deal correctly with split unwind edges.
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define void @test3_out() uwtable ssp {
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entry:
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invoke void @test0_in()
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to label %ret unwind label %lpad
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ret:
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ret void
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lpad:
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br label %lpad.cont
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lpad.cont:
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%exn = call i8* @llvm.eh.exception() nounwind
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%eh.selector = call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* %exn, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* bitcast (i8** @_ZTIi to i8*)) nounwind
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call void @_ZSt9terminatev()
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unreachable
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}
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; CHECK: define void @test3_out()
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; CHECK: call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* {{%.*}}, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i32 0, i8* bitcast (i8** @_ZTIi to i8*))
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; CHECK-NEXT: invoke void @_ZN1AD1Ev(
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; CHECK-NEXT: to label %[[L:[^\s]+]] unwind
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; CHECK: [[L]]:
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; CHECK-NEXT: br label %[[JOIN:[^\s]+]]
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; CHECK: [[JOIN]]:
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; CHECK-NEXT: phi
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; CHECK-NEXT: phi
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; CHECK-NEXT: br label %lpad.cont
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; CHECK: lpad.cont:
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; CHECK-NEXT: call void @_ZSt9terminatev()
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;; Test 4 - Split unwind edges with a dominance problem
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define void @test4_out() uwtable ssp {
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entry:
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invoke void @test0_in()
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to label %cont unwind label %lpad.crit
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cont:
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invoke void @opaque()
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to label %ret unwind label %lpad
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ret:
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ret void
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lpad.crit:
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call void @opaque() nounwind
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br label %lpad
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lpad:
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%phi = phi i32 [ 0, %lpad.crit ], [ 1, %cont ]
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%exn = call i8* @llvm.eh.exception() nounwind
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%eh.selector = call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* %exn, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* bitcast (i8** @_ZTIi to i8*)) nounwind
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call void @use(i32 %phi)
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call void @_ZSt9terminatev()
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unreachable
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}
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; CHECK: define void @test4_out()
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; CHECK: call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* {{%.*}}, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i32 0, i8* bitcast (i8** @_ZTIi to i8*))
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; CHECK-NEXT: invoke void @_ZN1AD1Ev(
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; CHECK-NEXT: to label %[[L:[^\s]+]] unwind
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; CHECK: [[L]]:
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; CHECK-NEXT: br label %[[JOIN:[^\s]+]]
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; CHECK: invoke void @opaque()
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; CHECK-NEXT: unwind label %lpad
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; CHECK: lpad.crit:
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; CHECK-NEXT: call i8* @llvm.eh.exception()
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; CHECK-NEXT: call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* %4, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* bitcast (i8** @_ZTIi to i8*))
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; CHECK-NEXT: br label %[[JOIN]]
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; CHECK: [[JOIN]]:
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; CHECK-NEXT: phi i8*
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; CHECK-NEXT: phi i32
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; CHECK-NEXT: call void @opaque() nounwind
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; CHECK-NEXT: br label %[[FIX:[^\s]+]]
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; CHECK: lpad:
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; CHECK-NEXT: [[T0:%.*]] = phi i32 [ 1, %cont ]
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; CHECK-NEXT: call i8* @llvm.eh.exception() nounwind
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; CHECK-NEXT: call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* %exn, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* bitcast (i8** @_ZTIi to i8*))
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; CHECK-NEXT: br label %[[FIX]]
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; CHECK: [[FIX]]:
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; CHECK-NEXT: [[T1:%.*]] = phi i32 [ [[T0]], %lpad ], [ 0, %[[JOIN]] ]
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; CHECK-NEXT: phi i8*
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; CHECK-NEXT: phi i32
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; CHECK-NEXT: call void @use(i32 [[T1]])
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; CHECK-NEXT: call void @_ZSt9terminatev()
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