mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 12:12:47 +01:00
fb3abba237
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
58 lines
2.2 KiB
LLVM
58 lines
2.2 KiB
LLVM
; RUN: opt -basicaa -gvn -S < %s | FileCheck %s
|
|
|
|
target datalayout = "e-p:64:64:64"
|
|
|
|
; CHECK-LABEL: @foo(
|
|
; CHECK: entry.end_crit_edge:
|
|
; CHECK: %j.phi.trans.insert = sext i32 %x to i64, !dbg [[J_LOC:![0-9]+]]
|
|
; CHECK: %q.phi.trans.insert = getelementptr {{.*}}, !dbg [[Q_LOC:![0-9]+]]
|
|
; CHECK: %n.pre = load i32, i32* %q.phi.trans.insert, !dbg [[N_LOC:![0-9]+]]
|
|
; CHECK: then:
|
|
; CHECK: store i32 %z
|
|
; CHECK: end:
|
|
; CHECK: %n = phi i32 [ %n.pre, %entry.end_crit_edge ], [ %z, %then ], !dbg [[N_LOC]]
|
|
; CHECK: ret i32 %n
|
|
|
|
; CHECK-DAG: [[J_LOC]] = !DILocation(line: 45, column: 1, scope: !{{.*}})
|
|
; CHECK-DAG: [[Q_LOC]] = !DILocation(line: 46, column: 1, scope: !{{.*}})
|
|
; CHECK-DAG: [[N_LOC]] = !DILocation(line: 47, column: 1, scope: !{{.*}})
|
|
|
|
@G = external global [100 x i32]
|
|
define i32 @foo(i32 %x, i32 %z) !dbg !6 {
|
|
entry:
|
|
%tobool = icmp eq i32 %z, 0, !dbg !7
|
|
br i1 %tobool, label %end, label %then, !dbg !7
|
|
|
|
then:
|
|
%i = sext i32 %x to i64, !dbg !8
|
|
%p = getelementptr [100 x i32], [100 x i32]* @G, i64 0, i64 %i, !dbg !8
|
|
store i32 %z, i32* %p, !dbg !8
|
|
br label %end, !dbg !8
|
|
|
|
end:
|
|
%j = sext i32 %x to i64, !dbg !9
|
|
%q = getelementptr [100 x i32], [100 x i32]* @G, i64 0, i64 %j, !dbg !10
|
|
%n = load i32, i32* %q, !dbg !11
|
|
ret i32 %n, !dbg !11
|
|
}
|
|
|
|
!llvm.module.flags = !{!0, !1, !2}
|
|
!llvm.dbg.cu = !{!12}
|
|
!0 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!1 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!2 = !{i32 1, !"PIC Level", i32 2}
|
|
|
|
!3 = !{}
|
|
!4 = !DISubroutineType(types: !3)
|
|
!5 = !DIFile(filename: "a.cc", directory: "/tmp")
|
|
!6 = distinct !DISubprogram(name: "foo", scope: !5, file: !5, line: 42, type: !4, isLocal: false, isDefinition: true, scopeLine: 43, flags: DIFlagPrototyped, isOptimized: false, unit: !12, variables: !3)
|
|
!7 = !DILocation(line: 43, column: 1, scope: !6)
|
|
!8 = !DILocation(line: 44, column: 1, scope: !6)
|
|
!9 = !DILocation(line: 45, column: 1, scope: !6)
|
|
!10 = !DILocation(line: 46, column: 1, scope: !6)
|
|
!11 = !DILocation(line: 47, column: 1, scope: !6)
|
|
!12 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang",
|
|
file: !5,
|
|
isOptimized: true, flags: "-O2",
|
|
splitDebugFilename: "abc.debug", emissionKind: 2)
|