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llvm/test/Transforms/Inline/inline_invoke.ll
Mark Seaborn 615f9b7162 Fix inlining to not produce duplicate landingpad clauses 
Before this change, inlining one "invoke" into an outer "invoke" call
site can lead to the outer landingpad's catch/filter clauses being
copied multiple times into the resulting landingpad.  This happens:

 * when the inlined function contains multiple "resume" instructions,
   because forwardResume() copies the clauses but is called multiple
   times;

 * when the inlined function contains a "resume" and a "call", because
   HandleCallsInBlockInlinedThroughInvoke() copies the clauses but is
   redundant with forwardResume().

Fix this by deduplicating the code.

This problem doesn't lead to any incorrect execution; it's only
untidy.

This change will make fixing PR17872 a little easier.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196710 91177308-0d34-0410-b5e6-96231b3b80d8
2013-12-08 00:50:58 +00:00

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; RUN: opt < %s -inline -S | FileCheck %s
; Test that the inliner correctly handles inlining into invoke sites
; by appending selectors and forwarding _Unwind_Resume directly to the
; enclosing landing pad.
;; Test 0 - basic functionality.
%struct.A = type { i8 }
@_ZTIi = external constant i8*
declare void @_ZN1AC1Ev(%struct.A*)
declare void @_ZN1AD1Ev(%struct.A*)
declare void @use(i32) nounwind
declare void @opaque()
declare i32 @llvm.eh.typeid.for(i8*) nounwind
declare i32 @__gxx_personality_v0(...)
declare i8* @__cxa_begin_catch(i8*)
declare void @__cxa_end_catch()
declare void @_ZSt9terminatev()
define internal void @test0_in() alwaysinline uwtable ssp {
entry:
%a = alloca %struct.A, align 1
%b = alloca %struct.A, align 1
call void @_ZN1AC1Ev(%struct.A* %a)
invoke void @_ZN1AC1Ev(%struct.A* %b)
to label %invoke.cont unwind label %lpad
invoke.cont:
invoke void @_ZN1AD1Ev(%struct.A* %b)
to label %invoke.cont1 unwind label %lpad
invoke.cont1:
call void @_ZN1AD1Ev(%struct.A* %a)
ret void
lpad:
%exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
cleanup
invoke void @_ZN1AD1Ev(%struct.A* %a)
to label %invoke.cont2 unwind label %terminate.lpad
invoke.cont2:
resume { i8*, i32 } %exn
terminate.lpad:
%exn1 = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
catch i8* null
call void @_ZSt9terminatev() noreturn nounwind
unreachable
}
define void @test0_out() uwtable ssp {
entry:
invoke void @test0_in()
to label %ret unwind label %lpad
ret:
ret void
lpad: ; preds = %entry
%exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
catch i8* bitcast (i8** @_ZTIi to i8*)
%eh.exc = extractvalue { i8*, i32 } %exn, 0
%eh.selector = extractvalue { i8*, i32 } %exn, 1
%0 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) nounwind
%1 = icmp eq i32 %eh.selector, %0
br i1 %1, label %catch, label %eh.resume
catch:
%ignored = call i8* @__cxa_begin_catch(i8* %eh.exc) nounwind
call void @__cxa_end_catch() nounwind
br label %ret
eh.resume:
resume { i8*, i32 } %exn
}
; CHECK: define void @test0_out()
; CHECK: [[A:%.*]] = alloca %struct.A,
; CHECK: [[B:%.*]] = alloca %struct.A,
; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A]])
; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B]])
; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B]])
; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A]])
; CHECK: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
; CHECK-NEXT: cleanup
; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
; CHECK-NEXT: invoke void @_ZN1AD1Ev(%struct.A* [[A]])
; CHECK-NEXT: to label %[[LBL:[^\s]+]] unwind
; CHECK: [[LBL]]:
; CHECK-NEXT: br label %[[LPAD:[^\s]+]]
; CHECK: ret void
; CHECK: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
; CHECK-NEXT: br label %[[LPAD]]
; CHECK: [[LPAD]]:
; CHECK-NEXT: phi { i8*, i32 } [
; CHECK-NEXT: extractvalue { i8*, i32 }
; CHECK-NEXT: extractvalue { i8*, i32 }
; CHECK-NEXT: call i32 @llvm.eh.typeid.for(
;; Test 1 - Correctly handle phis in outer landing pads.
define void @test1_out() uwtable ssp {
entry:
invoke void @test0_in()
to label %cont unwind label %lpad
cont:
invoke void @test0_in()
to label %ret unwind label %lpad
ret:
ret void
lpad:
%x = phi i32 [ 0, %entry ], [ 1, %cont ]
%y = phi i32 [ 1, %entry ], [ 4, %cont ]
%exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
catch i8* bitcast (i8** @_ZTIi to i8*)
%eh.exc = extractvalue { i8*, i32 } %exn, 0
%eh.selector = extractvalue { i8*, i32 } %exn, 1
%0 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) nounwind
%1 = icmp eq i32 %eh.selector, %0
br i1 %1, label %catch, label %eh.resume
catch:
%ignored = call i8* @__cxa_begin_catch(i8* %eh.exc) nounwind
call void @use(i32 %x)
call void @use(i32 %y)
call void @__cxa_end_catch() nounwind
br label %ret
eh.resume:
resume { i8*, i32 } %exn
}
; CHECK: define void @test1_out()
; CHECK: [[A2:%.*]] = alloca %struct.A,
; CHECK: [[B2:%.*]] = alloca %struct.A,
; CHECK: [[A1:%.*]] = alloca %struct.A,
; CHECK: [[B1:%.*]] = alloca %struct.A,
; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A1]])
; CHECK-NEXT: unwind label %[[LPAD:[^\s]+]]
; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B1]])
; CHECK-NEXT: unwind label %[[LPAD1:[^\s]+]]
; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B1]])
; CHECK-NEXT: unwind label %[[LPAD1]]
; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A1]])
; CHECK-NEXT: unwind label %[[LPAD]]
; Inner landing pad from first inlining.
; CHECK: [[LPAD1]]:
; CHECK-NEXT: [[LPADVAL1:%.*]] = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
; CHECK-NEXT: cleanup
; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
; CHECK-NEXT: invoke void @_ZN1AD1Ev(%struct.A* [[A1]])
; CHECK-NEXT: to label %[[RESUME1:[^\s]+]] unwind
; CHECK: [[RESUME1]]:
; CHECK-NEXT: br label %[[LPAD_JOIN1:[^\s]+]]
; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A2]])
; CHECK-NEXT: unwind label %[[LPAD]]
; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B2]])
; CHECK-NEXT: unwind label %[[LPAD2:[^\s]+]]
; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B2]])
; CHECK-NEXT: unwind label %[[LPAD2]]
; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A2]])
; CHECK-NEXT: unwind label %[[LPAD]]
; Inner landing pad from second inlining.
; CHECK: [[LPAD2]]:
; CHECK-NEXT: [[LPADVAL2:%.*]] = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
; CHECK-NEXT: cleanup
; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
; CHECK-NEXT: invoke void @_ZN1AD1Ev(%struct.A* [[A2]])
; CHECK-NEXT: to label %[[RESUME2:[^\s]+]] unwind
; CHECK: [[RESUME2]]:
; CHECK-NEXT: br label %[[LPAD_JOIN2:[^\s]+]]
; CHECK: ret void
; CHECK: [[LPAD]]:
; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, %entry ], [ 0, {{%.*}} ], [ 1, %cont ], [ 1, {{%.*}} ]
; CHECK-NEXT: [[Y:%.*]] = phi i32 [ 1, %entry ], [ 1, {{%.*}} ], [ 4, %cont ], [ 4, {{%.*}} ]
; CHECK-NEXT: [[LPADVAL:%.*]] = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
; CHECK-NEXT: br label %[[LPAD_JOIN2]]
; CHECK: [[LPAD_JOIN2]]:
; CHECK-NEXT: [[XJ2:%.*]] = phi i32 [ [[X]], %[[LPAD]] ], [ 1, %[[RESUME2]] ]
; CHECK-NEXT: [[YJ2:%.*]] = phi i32 [ [[Y]], %[[LPAD]] ], [ 4, %[[RESUME2]] ]
; CHECK-NEXT: [[EXNJ2:%.*]] = phi { i8*, i32 } [ [[LPADVAL]], %[[LPAD]] ], [ [[LPADVAL2]], %[[RESUME2]] ]
; CHECK-NEXT: br label %[[LPAD_JOIN1]]
; CHECK: [[LPAD_JOIN1]]:
; CHECK-NEXT: [[XJ1:%.*]] = phi i32 [ [[XJ2]], %[[LPAD_JOIN2]] ], [ 0, %[[RESUME1]] ]
; CHECK-NEXT: [[YJ1:%.*]] = phi i32 [ [[YJ2]], %[[LPAD_JOIN2]] ], [ 1, %[[RESUME1]] ]
; CHECK-NEXT: [[EXNJ1:%.*]] = phi { i8*, i32 } [ [[EXNJ2]], %[[LPAD_JOIN2]] ], [ [[LPADVAL1]], %[[RESUME1]] ]
; CHECK-NEXT: extractvalue { i8*, i32 } [[EXNJ1]], 0
; CHECK-NEXT: [[SELJ1:%.*]] = extractvalue { i8*, i32 } [[EXNJ1]], 1
; CHECK-NEXT: [[T:%.*]] = call i32 @llvm.eh.typeid.for(
; CHECK-NEXT: icmp eq i32 [[SELJ1]], [[T]]
; CHECK: call void @use(i32 [[XJ1]])
; CHECK: call void @use(i32 [[YJ1]])
; CHECK: resume { i8*, i32 }
;; Test 2 - Don't make invalid IR for inlines into landing pads without eh.exception calls
define void @test2_out() uwtable ssp {
entry:
invoke void @test0_in()
to label %ret unwind label %lpad
ret:
ret void
lpad:
%exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
cleanup
call void @_ZSt9terminatev()
unreachable
}
; CHECK: define void @test2_out()
; CHECK: [[A:%.*]] = alloca %struct.A,
; CHECK: [[B:%.*]] = alloca %struct.A,
; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A]])
; CHECK-NEXT: unwind label %[[LPAD:[^\s]+]]
; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B]])
; CHECK-NEXT: unwind label %[[LPAD2:[^\s]+]]
; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B]])
; CHECK-NEXT: unwind label %[[LPAD2]]
; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A]])
; CHECK-NEXT: unwind label %[[LPAD]]
;; Test 3 - Deal correctly with split unwind edges.
define void @test3_out() uwtable ssp {
entry:
invoke void @test0_in()
to label %ret unwind label %lpad
ret:
ret void
lpad:
%exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
catch i8* bitcast (i8** @_ZTIi to i8*)
br label %lpad.cont
lpad.cont:
call void @_ZSt9terminatev()
unreachable
}
; CHECK: define void @test3_out()
; CHECK: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
; CHECK-NEXT: cleanup
; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
; CHECK-NEXT: invoke void @_ZN1AD1Ev(
; CHECK-NEXT: to label %[[L:[^\s]+]] unwind
; CHECK: [[L]]:
; CHECK-NEXT: br label %[[JOIN:[^\s]+]]
; CHECK: [[JOIN]]:
; CHECK-NEXT: phi { i8*, i32 }
; CHECK-NEXT: br label %lpad.cont
; CHECK: lpad.cont:
; CHECK-NEXT: call void @_ZSt9terminatev()
;; Test 4 - Split unwind edges with a dominance problem
define void @test4_out() uwtable ssp {
entry:
invoke void @test0_in()
to label %cont unwind label %lpad.crit
cont:
invoke void @opaque()
to label %ret unwind label %lpad
ret:
ret void
lpad.crit:
%exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
catch i8* bitcast (i8** @_ZTIi to i8*)
call void @opaque() nounwind
br label %terminate
lpad:
%exn2 = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
catch i8* bitcast (i8** @_ZTIi to i8*)
br label %terminate
terminate:
%phi = phi i32 [ 0, %lpad.crit ], [ 1, %lpad ]
call void @use(i32 %phi)
call void @_ZSt9terminatev()
unreachable
}
; CHECK: define void @test4_out()
; CHECK: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
; CHECK-NEXT: cleanup
; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
; CHECK-NEXT: invoke void @_ZN1AD1Ev(
; CHECK-NEXT: to label %[[L:[^\s]+]] unwind
; CHECK: [[L]]:
; CHECK-NEXT: br label %[[JOIN:[^\s]+]]
; CHECK: invoke void @opaque()
; CHECK-NEXT: unwind label %lpad
; CHECK: lpad.crit:
; CHECK-NEXT: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
; CHECK-NEXT: br label %[[JOIN]]
; CHECK: [[JOIN]]:
; CHECK-NEXT: phi { i8*, i32 }
; CHECK-NEXT: call void @opaque() [[NUW:#[0-9]+]]
; CHECK-NEXT: br label %[[FIX:[^\s]+]]
; CHECK: lpad:
; CHECK-NEXT: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
; CHECK-NEXT: br label %[[FIX]]
; CHECK: [[FIX]]:
; CHECK-NEXT: [[T1:%.*]] = phi i32 [ 0, %[[JOIN]] ], [ 1, %lpad ]
; CHECK-NEXT: call void @use(i32 [[T1]])
; CHECK-NEXT: call void @_ZSt9terminatev()
; CHECK: attributes [[NUW]] = { nounwind }
; CHECK: attributes #1 = { nounwind readnone }
; CHECK: attributes #2 = { ssp uwtable }
; CHECK: attributes #3 = { noreturn nounwind }
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