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llvm-mirror/test/CodeGen/WinEH/wineh-cloning.ll
Adrian Prantl fb3abba237 [PR27284] Reverse the ownership between DICompileUnit and DISubprogram. 
Currently each Function points to a DISubprogram and DISubprogram has a
scope field. For member functions the scope is a DICompositeType. DIScopes
point to the DICompileUnit to facilitate type uniquing.

Distinct DISubprograms (with isDefinition: true) are not part of the type
hierarchy and cannot be uniqued. This change removes the subprograms
list from DICompileUnit and instead adds a pointer to the owning compile
unit to distinct DISubprograms. This would make it easy for ThinLTO to
strip unneeded DISubprograms and their transitively referenced debug info.

Motivation
----------

Materializing DISubprograms is currently the most expensive operation when
doing a ThinLTO build of clang.

We want the DISubprogram to be stored in a separate Bitcode block (or the
same block as the function body) so we can avoid having to expensively
deserialize all DISubprograms together with the global metadata. If a
function has been inlined into another subprogram we need to store a
reference the block containing the inlined subprogram.

Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script
that updates LLVM IR testcases to the new format.

http://reviews.llvm.org/D19034
<rdar://problem/25256815>

llvm-svn: 266446
2016-04-15 15:57:41 +00:00

394 lines
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; RUN: opt -mtriple=x86_64-pc-windows-msvc -S -winehprepare < %s | FileCheck %s
declare i32 @__CxxFrameHandler3(...)
declare i32 @__C_specific_handler(...)
declare void @ProcessCLRException(...)
declare void @f()
declare void @llvm.foo(i32) nounwind
declare void @llvm.bar() nounwind
declare i32 @llvm.qux() nounwind
declare i1 @llvm.baz() nounwind
define void @test1() personality i32 (...)* @__CxxFrameHandler3 {
entry:
; %x def colors: {entry} subset of use colors; must spill
%x = call i32 @llvm.qux()
invoke void @f()
to label %noreturn unwind label %catch.switch
catch.switch:
%cs = catchswitch within none [label %catch] unwind to caller
catch:
%cp = catchpad within %cs []
br label %noreturn
noreturn:
; %x use colors: {entry, cleanup}
call void @llvm.foo(i32 %x)
unreachable
}
; Need two copies of the call to @h, one under entry and one under catch.
; Currently we generate a load for each, though we shouldn't need one
; for the use in entry's copy.
; CHECK-LABEL: define void @test1(
; CHECK: entry:
; CHECK: %x = call i32 @llvm.qux()
; CHECK: invoke void @f()
; CHECK: to label %[[EntryCopy:[^ ]+]] unwind label %catch
; CHECK: catch.switch:
; CHECK: %cs = catchswitch within none [label %catch] unwind to caller
; CHECK: catch:
; CHECK: catchpad within %cs []
; CHECK-NEXT: call void @llvm.foo(i32 %x)
; CHECK: [[EntryCopy]]:
; CHECK: call void @llvm.foo(i32 %x)
define void @test2() personality i32 (...)* @__CxxFrameHandler3 {
entry:
invoke void @f()
to label %exit unwind label %cleanup
cleanup:
cleanuppad within none []
br label %exit
exit:
call void @llvm.bar()
ret void
}
; Need two copies of %exit's call to @f -- the subsequent ret is only
; valid when coming from %entry, but on the path from %cleanup, this
; might be a valid call to @f which might dynamically not return.
; CHECK-LABEL: define void @test2(
; CHECK: entry:
; CHECK: invoke void @f()
; CHECK: to label %[[exit:[^ ]+]] unwind label %cleanup
; CHECK: cleanup:
; CHECK: cleanuppad within none []
; CHECK: call void @llvm.bar()
; CHECK-NEXT: unreachable
; CHECK: [[exit]]:
; CHECK: call void @llvm.bar()
; CHECK-NEXT: ret void
define void @test3() personality i32 (...)* @__CxxFrameHandler3 {
entry:
invoke void @f()
to label %invoke.cont unwind label %catch.switch
invoke.cont:
invoke void @f()
to label %exit unwind label %cleanup
catch.switch:
%cs = catchswitch within none [label %catch] unwind to caller
catch:
catchpad within %cs []
br label %shared
cleanup:
cleanuppad within none []
br label %shared
shared:
call void @llvm.bar()
br label %exit
exit:
ret void
}
; Need two copies of %shared's call to @f (similar to @test2 but
; the two regions here are siblings, not parent-child).
; CHECK-LABEL: define void @test3(
; CHECK: invoke void @f()
; CHECK: invoke void @f()
; CHECK: to label %[[exit:[^ ]+]] unwind
; CHECK: catch:
; CHECK: catchpad within %cs []
; CHECK-NEXT: call void @llvm.bar()
; CHECK-NEXT: unreachable
; CHECK: cleanup:
; CHECK: cleanuppad within none []
; CHECK: call void @llvm.bar()
; CHECK-NEXT: unreachable
; CHECK: [[exit]]:
; CHECK: ret void
define void @test4() personality i32 (...)* @__CxxFrameHandler3 {
entry:
invoke void @f()
to label %shared unwind label %catch.switch
catch.switch:
%cs = catchswitch within none [label %catch] unwind to caller
catch:
catchpad within %cs []
br label %shared
shared:
%x = call i32 @llvm.qux()
%i = call i32 @llvm.qux()
%zero.trip = icmp eq i32 %i, 0
br i1 %zero.trip, label %exit, label %loop
loop:
%i.loop = phi i32 [ %i, %shared ], [ %i.dec, %loop.tail ]
%b = call i1 @llvm.baz()
br i1 %b, label %left, label %right
left:
%y = call i32 @llvm.qux()
br label %loop.tail
right:
call void @llvm.foo(i32 %x)
br label %loop.tail
loop.tail:
%i.dec = sub i32 %i.loop, 1
%done = icmp eq i32 %i.dec, 0
br i1 %done, label %exit, label %loop
exit:
call void @llvm.foo(i32 %x)
unreachable
}
; Make sure we can clone regions that have internal control
; flow and SSA values. Here we need two copies of everything
; from %shared to %exit.
; CHECK-LABEL: define void @test4(
; CHECK: entry:
; CHECK: to label %[[shared_E:[^ ]+]] unwind label %catch.switch
; CHECK: catch:
; CHECK: catchpad within %cs []
; CHECK: [[x_C:%[^ ]+]] = call i32 @llvm.qux()
; CHECK: [[i_C:%[^ ]+]] = call i32 @llvm.qux()
; CHECK: [[zt_C:%[^ ]+]] = icmp eq i32 [[i_C]], 0
; CHECK: br i1 [[zt_C]], label %[[exit_C:[^ ]+]], label %[[loop_C:[^ ]+]]
; CHECK: [[shared_E]]:
; CHECK: [[x_E:%[^ ]+]] = call i32 @llvm.qux()
; CHECK: [[i_E:%[^ ]+]] = call i32 @llvm.qux()
; CHECK: [[zt_E:%[^ ]+]] = icmp eq i32 [[i_E]], 0
; CHECK: br i1 [[zt_E]], label %[[exit_E:[^ ]+]], label %[[loop_E:[^ ]+]]
; CHECK: [[loop_C]]:
; CHECK: [[iloop_C:%[^ ]+]] = phi i32 [ [[i_C]], %catch ], [ [[idec_C:%[^ ]+]], %[[looptail_C:[^ ]+]] ]
; CHECK: [[b_C:%[^ ]+]] = call i1 @llvm.baz()
; CHECK: br i1 [[b_C]], label %[[left_C:[^ ]+]], label %[[right_C:[^ ]+]]
; CHECK: [[loop_E]]:
; CHECK: [[iloop_E:%[^ ]+]] = phi i32 [ [[i_E]], %[[shared_E]] ], [ [[idec_E:%[^ ]+]], %[[looptail_E:[^ ]+]] ]
; CHECK: [[b_E:%[^ ]+]] = call i1 @llvm.baz()
; CHECK: br i1 [[b_E]], label %[[left_E:[^ ]+]], label %[[right_E:[^ ]+]]
; CHECK: [[left_C]]:
; CHECK: [[y_C:%[^ ]+]] = call i32 @llvm.qux()
; CHECK: br label %[[looptail_C]]
; CHECK: [[left_E]]:
; CHECK: [[y_E:%[^ ]+]] = call i32 @llvm.qux()
; CHECK: br label %[[looptail_E]]
; CHECK: [[right_C]]:
; CHECK: call void @llvm.foo(i32 [[x_C]])
; CHECK: br label %[[looptail_C]]
; CHECK: [[right_E]]:
; CHECK: call void @llvm.foo(i32 [[x_E]])
; CHECK: br label %[[looptail_E]]
; CHECK: [[looptail_C]]:
; CHECK: [[idec_C]] = sub i32 [[iloop_C]], 1
; CHECK: [[done_C:%[^ ]+]] = icmp eq i32 [[idec_C]], 0
; CHECK: br i1 [[done_C]], label %[[exit_C]], label %[[loop_C]]
; CHECK: [[looptail_E]]:
; CHECK: [[idec_E]] = sub i32 [[iloop_E]], 1
; CHECK: [[done_E:%[^ ]+]] = icmp eq i32 [[idec_E]], 0
; CHECK: br i1 [[done_E]], label %[[exit_E]], label %[[loop_E]]
; CHECK: [[exit_C]]:
; CHECK: call void @llvm.foo(i32 [[x_C]])
; CHECK: unreachable
; CHECK: [[exit_E]]:
; CHECK: call void @llvm.foo(i32 [[x_E]])
; CHECK: unreachable
define void @test5() personality i32 (...)* @__C_specific_handler {
entry:
invoke void @f()
to label %exit unwind label %outer
outer:
%o = cleanuppad within none []
%x = call i32 @llvm.qux()
invoke void @f() [ "funclet"(token %o) ]
to label %outer.ret unwind label %catch.switch
catch.switch:
%cs = catchswitch within %o [label %inner] unwind to caller
inner:
%i = catchpad within %cs []
catchret from %i to label %outer.post-inner
outer.post-inner:
call void @llvm.foo(i32 %x)
br label %outer.ret
outer.ret:
cleanupret from %o unwind to caller
exit:
ret void
}
; Simple nested case (catch-inside-cleanup). Nothing needs
; to be cloned. The def and use of %x are both in %outer
; and so don't need to be spilled.
; CHECK-LABEL: define void @test5(
; CHECK: outer:
; CHECK: %x = call i32 @llvm.qux()
; CHECK-NEXT: invoke void @f()
; CHECK-NEXT: to label %outer.ret unwind label %catch.switch
; CHECK: inner:
; CHECK-NEXT: %i = catchpad within %cs []
; CHECK-NEXT: catchret from %i to label %outer.post-inner
; CHECK: outer.post-inner:
; CHECK-NEXT: call void @llvm.foo(i32 %x)
; CHECK-NEXT: br label %outer.ret
define void @test10() personality i32 (...)* @__CxxFrameHandler3 {
entry:
invoke void @f()
to label %unreachable unwind label %inner
inner:
%cleanup = cleanuppad within none []
; make sure we don't overlook this cleanupret and try to process
; successor %outer as a child of inner.
cleanupret from %cleanup unwind label %outer
outer:
%cs = catchswitch within none [label %catch.body] unwind to caller
catch.body:
%catch = catchpad within %cs []
catchret from %catch to label %exit
exit:
ret void
unreachable:
unreachable
}
; CHECK-LABEL: define void @test10(
; CHECK-NEXT: entry:
; CHECK-NEXT: invoke
; CHECK-NEXT: to label %unreachable unwind label %inner
; CHECK: inner:
; CHECK-NEXT: %cleanup = cleanuppad within none []
; CHECK-NEXT: cleanupret from %cleanup unwind label %outer
; CHECK: outer:
; CHECK-NEXT: %cs = catchswitch within none [label %catch.body] unwind to caller
; CHECK: catch.body:
; CHECK-NEXT: %catch = catchpad within %cs []
; CHECK-NEXT: catchret from %catch to label %exit
; CHECK: exit:
; CHECK-NEXT: ret void
define void @test11() personality i32 (...)* @__C_specific_handler {
entry:
invoke void @f()
to label %exit unwind label %cleanup.outer
cleanup.outer:
%outer = cleanuppad within none []
invoke void @f() [ "funclet"(token %outer) ]
to label %outer.cont unwind label %cleanup.inner
outer.cont:
br label %merge
cleanup.inner:
%inner = cleanuppad within %outer []
br label %merge
merge:
call void @llvm.bar()
unreachable
exit:
ret void
}
; merge.end will get cloned for outer and inner, but is implausible
; from inner, so the call @f() in inner's copy of merge should be
; rewritten to call @f()
; CHECK-LABEL: define void @test11()
; CHECK: %inner = cleanuppad within %outer []
; CHECK-NEXT: call void @llvm.bar()
; CHECK-NEXT: unreachable
define void @test12() personality i32 (...)* @__CxxFrameHandler3 !dbg !5 {
entry:
invoke void @f()
to label %cont unwind label %left, !dbg !8
cont:
invoke void @f()
to label %exit unwind label %right
left:
cleanuppad within none []
br label %join
right:
cleanuppad within none []
br label %join
join:
; This call will get cloned; make sure we can handle cloning
; instructions with debug metadata attached.
call void @llvm.bar(), !dbg !9
unreachable
exit:
ret void
}
; CHECK-LABEL: define void @test13()
; CHECK: ret void
define void @test13() personality i32 (...)* @__CxxFrameHandler3 {
entry:
ret void
unreachable:
cleanuppad within none []
unreachable
}
define void @test14() personality void (...)* @ProcessCLRException {
entry:
invoke void @f()
to label %cont unwind label %cleanup
cont:
invoke void @f()
to label %exit unwind label %switch.outer
cleanup:
%cleanpad = cleanuppad within none []
invoke void @f() [ "funclet" (token %cleanpad) ]
to label %cleanret unwind label %switch.inner
switch.inner:
%cs.inner = catchswitch within %cleanpad [label %pad.inner] unwind to caller
pad.inner:
%cp.inner = catchpad within %cs.inner [i32 1]
catchret from %cp.inner to label %join
cleanret:
cleanupret from %cleanpad unwind to caller
switch.outer:
%cs.outer = catchswitch within none [label %pad.outer] unwind to caller
pad.outer:
%cp.outer = catchpad within %cs.outer [i32 2]
catchret from %cp.outer to label %join
join:
%phi = phi i32 [ 1, %pad.inner ], [ 2, %pad.outer ]
call void @llvm.foo(i32 %phi)
unreachable
exit:
ret void
}
; Both catchrets target %join, but the catchret from %cp.inner
; returns to %cleanpad and the catchret from %cp.outer returns to the
; main function, so %join needs to get cloned and one of the cleanuprets
; needs to be updated to target the clone
; CHECK-LABEL: define void @test14()
; CHECK: catchret from %cp.inner to label %[[Clone1:.+]]
; CHECK: catchret from %cp.outer to label %[[Clone2:.+]]
; CHECK: [[Clone1]]:
; CHECK-NEXT: call void @llvm.foo(i32 1)
; CHECK-NEXT: unreachable
; CHECK: [[Clone2]]:
; CHECK-NEXT: call void @llvm.foo(i32 2)
; CHECK-NEXT: unreachable
;; Debug info (from test12)
; Make sure the DISubprogram doesn't get cloned
; CHECK-LABEL: !llvm.module.flags
; CHECK-NOT: !DISubprogram
; CHECK: !{{[0-9]+}} = distinct !DISubprogram(name: "test12"
; CHECK-NOT: !DISubprogram
!llvm.module.flags = !{!0}
!llvm.dbg.cu = !{!1}
!0 = !{i32 2, !"Debug Info Version", i32 3}
!1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "compiler", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !3)
!2 = !DIFile(filename: "test.cpp", directory: ".")
!3 = !{}
!5 = distinct !DISubprogram(name: "test12", scope: !2, file: !2, type: !6, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !1, variables: !3)
!6 = !DISubroutineType(types: !7)
!7 = !{null}
!8 = !DILocation(line: 1, scope: !5)
!9 = !DILocation(line: 2, scope: !5)
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