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llvm/test/Transforms/Inline/inline_invoke.ll
Chandler Carruth 2789d18739 [PM] Move the collection of call sites to a more appropriate place 
inside of `InlineFunction`. Prior to this, call instructions are
specifically being rewritten and replaced within the inlined region,
invalidating some of the call sites.

Several of these regions are using the same technique to walk the
inlined region so this seems clearly safe up to this point.

I've also added a short circuit to the scan for call sites based on what
other code is doing.

With this, the most common crash I've found in the new inliner code is
fixed. I've turned it on for another test case that covers this
scenario.

I'll make my way through most of the other inliner test cases
just to get some easy coverage next.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290562 91177308-0d34-0410-b5e6-96231b3b80d8
2016-12-27 01:24:50 +00:00

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; RUN: opt < %s -inline -S | FileCheck %s
; RUN: opt < %s -passes='cgscc(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 personality i32 (...)* @__gxx_personality_v0 {
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}
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}
catch i8* null
call void @_ZSt9terminatev() noreturn nounwind
unreachable
}
define void @test0_out() uwtable ssp personality i32 (...)* @__gxx_personality_v0 {
entry:
invoke void @test0_in()
to label %ret unwind label %lpad
ret:
ret void
lpad: ; preds = %entry
%exn = landingpad {i8*, i32}
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 }
; 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 }
; 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 personality i32 (...)* @__gxx_personality_v0 {
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}
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 }
; 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 }
; 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 }
; 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 personality i32 (...)* @__gxx_personality_v0 {
entry:
invoke void @test0_in()
to label %ret unwind label %lpad
ret:
ret void
lpad:
%exn = landingpad {i8*, i32}
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 personality i32 (...)* @__gxx_personality_v0 {
entry:
invoke void @test0_in()
to label %ret unwind label %lpad
ret:
ret void
lpad:
%exn = landingpad {i8*, i32}
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 }
; 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 personality i32 (...)* @__gxx_personality_v0 {
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}
catch i8* bitcast (i8** @_ZTIi to i8*)
call void @opaque() nounwind
br label %terminate
lpad:
%exn2 = landingpad {i8*, i32}
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 }
; 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 }
; 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 }
; 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 = { argmemonly nounwind }
; CHECK: attributes #4 = { noreturn nounwind }
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