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llvm-mirror/test/Bitcode/debug-loc-again.ll
Duncan P. N. Exon Smith 0c1aee0b16 DI: Require subprogram definitions to be distinct
As a follow-up to r246098, require `DISubprogram` definitions
(`isDefinition: true`) to be 'distinct'.  Specifically, add an assembler
check, a verifier check, and bitcode upgrading logic to combat testcase
bitrot after the `DIBuilder` change.

While working on the testcases, I realized that
test/Linker/subprogram-linkonce-weak-odr.ll isn't relevant anymore.  Its
purpose was to check for a corner case in PR22792 where two subprogram
definitions match exactly and share the same metadata node.  The new
verifier check, requiring that subprogram definitions are 'distinct',
precludes that possibility.

I updated almost all the IR with the following script:

    git grep -l -E -e '= !DISubprogram\(.* isDefinition: true' |
    grep -v test/Bitcode |
    xargs sed -i '' -e 's/= \(!DISubprogram(.*, isDefinition: true\)/= distinct \1/'

Likely some variant of would work for out-of-tree testcases.

llvm-svn: 246327
2015-08-28 20:26:49 +00:00

37 lines
1.1 KiB
LLVM

; RUN: llvm-as < %s | llvm-bcanalyzer -dump | FileCheck %s -check-prefix=BC
; PR23436: Actually emit DEBUG_LOC_AGAIN records.
; BC: <DEBUG_LOC op
; BC: <DEBUG_LOC_AGAIN/>
; BC: <DEBUG_LOC op
; BC: <DEBUG_LOC_AGAIN/>
; RUN: llvm-as < %s | llvm-dis | FileCheck %s
; RUN: verify-uselistorder %s
; Check that this round-trips correctly.
define void @foo() {
entry:
%a = add i32 0, 0, !dbg !3
%b = add i32 0, 1, !dbg !3
%c = add i32 0, 2, !dbg !4
ret void, !dbg !4
}
; CHECK-LABEL: entry:
; CHECK-NEXT: %a = add i32 0, 0, !dbg ![[LINE1:[0-9]+]]
; CHECK-NEXT: %b = add i32 0, 1, !dbg ![[LINE1]]
; CHECK-NEXT: %c = add i32 0, 2, !dbg ![[LINE2:[0-9]+]]
; CHECK-NEXT: ret void, !dbg ![[LINE2]]
; CHECK: ![[LINE1]] = !DILocation(line: 1,
; CHECK: ![[LINE2]] = !DILocation(line: 2,
!llvm.module.flags = !{!0}
!0 = !{i32 2, !"Debug Info Version", i32 3}
!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !DIFile(filename: "f", directory: "/d"),
subprograms: !{!2})
!2 = distinct !DISubprogram(name: "foo")
!3 = !DILocation(line: 1, scope: !2)
!4 = !DILocation(line: 2, scope: !2)