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llvm/test/DebugInfo/Mips/dsr-fixed-objects.ll
Keno Fischer bae9026417 Clean up the processing of dbg.value in various places 
Summary:
First up is instcombine, where in the dbg.declare -> dbg.value conversion,
the llvm.dbg.value needs to be called on the actual loaded value, rather
than the address (since the whole point of this transformation is to be
able to get rid of the alloca). Further, now that that's cleaned up, we
can remove a hack in the backend, that would add an implicit OP_deref if
the argument to dbg.value was an alloca. This stems from before the
existence of DIExpression and is no longer necessary since the deref can
be expressed explicitly.

Now, in order to make sure that the tests pass with this change, we need to
correct the printing of DEBUG_VALUE comments to take into account the
expression, which wasn't taken into account before.

Unfortunately, for both these changes, there were a number of incorrect
test cases (mostly the wrong number of DW_OP_derefs, but also a couple
where the test itself was broken more badly). aprantl and I have gone
through and adjusted these test case in order to make them pass with
these fixes and in some cases to make sure they're actually testing
what they are meant to test.

Reviewers: aprantl

Subscribers: dsanders

Differential Revision: http://reviews.llvm.org/D14186

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256077 91177308-0d34-0410-b5e6-96231b3b80d8
2015-12-19 02:02:44 +00:00

157 lines
8.0 KiB
LLVM
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; RUN: llc -march=mips -mcpu=mips32r2 -O1 -filetype=obj <%s | \
; RUN: llvm-dwarfdump -debug-dump=all - | FileCheck %s -check-prefix=F0
; RUN: llc -march=mips -mcpu=mips32r2 -O1 -filetype=obj <%s | \
; RUN: llvm-dwarfdump -debug-dump=all - | FileCheck %s -check-prefix=F1
; void foo(int *);
;
; int f0(int a, int b, int c, int d, int e) {
; int x = a + b + c + d + e;
; foo(&x);
; return x;
; }
;
; int f1(int a, int b, int c, int d, int e) {
; int x __attribute__((aligned(16))) = a + b + c + d + e;
; foo(&x);
; return x;
; }
declare void @llvm.lifetime.start(i64, i8* nocapture)
declare void @llvm.lifetime.end(i64, i8* nocapture)
declare void @foo(i32*)
; F0: DW_AT_location [DW_FORM_sec_offset] (0x00000014)
; F0: DW_AT_name [DW_FORM_strp] ( .debug_str[0x0000006b] = "x")
;
; x -> DW_OP_reg1(51)
; F0: 0x00000014: Beginning address offset: 0x0000000000000028
; F0: Ending address offset: 0x0000000000000030
; F0: Location description: 51
define i32 @f0(i32 signext %a, i32 signext %b, i32 signext %c, i32 signext %d, i32 signext %e) !dbg !4 {
entry:
%x = alloca i32, align 4
tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !9, metadata !DIExpression()), !dbg !27
tail call void @llvm.dbg.value(metadata i32 %b, i64 0, metadata !10, metadata !DIExpression()), !dbg !28
tail call void @llvm.dbg.value(metadata i32 %c, i64 0, metadata !11, metadata !DIExpression()), !dbg !29
tail call void @llvm.dbg.value(metadata i32 %d, i64 0, metadata !12, metadata !DIExpression()), !dbg !30
tail call void @llvm.dbg.value(metadata i32 %e, i64 0, metadata !13, metadata !DIExpression()), !dbg !31
%0 = bitcast i32* %x to i8*, !dbg !32
call void @llvm.lifetime.start(i64 4, i8* %0) #4, !dbg !32
%add = add nsw i32 %b, %a, !dbg !33
%add1 = add nsw i32 %add, %c, !dbg !34
%add2 = add nsw i32 %add1, %d, !dbg !35
%add3 = add nsw i32 %add2, %e, !dbg !36
tail call void @llvm.dbg.value(metadata i32 %add3, i64 0, metadata !14, metadata !DIExpression()), !dbg !37
store i32 %add3, i32* %x, align 4, !dbg !37, !tbaa !38
tail call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !14, metadata !26), !dbg !37
call void @foo(i32* nonnull %x) #4, !dbg !42
call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !14, metadata !26), !dbg !37
%1 = load i32, i32* %x, align 4, !dbg !43, !tbaa !38
call void @llvm.lifetime.end(i64 4, i8* %0) #4, !dbg !44
ret i32 %1, !dbg !45
}
; F1: DW_AT_location [DW_FORM_sec_offset] (0x00000033)
; F1: DW_AT_name [DW_FORM_strp] ( .debug_str[0x0000006b] = "x")
; x -> DW_OP_reg1(51)
; F1: 0x00000033: Beginning address offset: 0x0000000000000080
; F1: Ending address offset: 0x0000000000000088
; F1: Location description: 51
define i32 @f1(i32 signext %a, i32 signext %b, i32 signext %c, i32 signext %d, i32 signext %e) !dbg !15 {
entry:
%x = alloca i32, align 16
tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !17, metadata !DIExpression()), !dbg !46
tail call void @llvm.dbg.value(metadata i32 %b, i64 0, metadata !18, metadata !DIExpression()), !dbg !47
tail call void @llvm.dbg.value(metadata i32 %c, i64 0, metadata !19, metadata !DIExpression()), !dbg !48
tail call void @llvm.dbg.value(metadata i32 %d, i64 0, metadata !20, metadata !DIExpression()), !dbg !49
tail call void @llvm.dbg.value(metadata i32 %e, i64 0, metadata !21, metadata !DIExpression()), !dbg !50
%0 = bitcast i32* %x to i8*, !dbg !51
call void @llvm.lifetime.start(i64 4, i8* %0) #4, !dbg !51
%add = add nsw i32 %b, %a, !dbg !52
%add1 = add nsw i32 %add, %c, !dbg !53
%add2 = add nsw i32 %add1, %d, !dbg !54
%add3 = add nsw i32 %add2, %e, !dbg !55
tail call void @llvm.dbg.value(metadata i32 %add3, i64 0, metadata !22, metadata !DIExpression()), !dbg !56
store i32 %add3, i32* %x, align 16, !dbg !56, !tbaa !38
tail call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !22, metadata !26), !dbg !56
call void @foo(i32* nonnull %x) #4, !dbg !57
call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !22, metadata !26), !dbg !56
%1 = load i32, i32* %x, align 16, !dbg !58, !tbaa !38
call void @llvm.lifetime.end(i64 4, i8* %0) #4, !dbg !59
ret i32 %1, !dbg !60
}
declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!23, !24}
!llvm.ident = !{!25}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 251783) (llvm/trunk 251781)", isOptimized: true, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3)
!1 = !DIFile(filename: "test.c", directory: "/home/vk/repos/tmp/dwarf")
!2 = !{}
!3 = !{!4, !15}
!4 = distinct !DISubprogram(name: "f0", scope: !1, file: !1, line: 4, type: !5, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, variables: !8)
!5 = !DISubroutineType(types: !6)
!6 = !{!7, !7, !7, !7, !7, !7}
!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!8 = !{!9, !10, !11, !12, !13, !14}
!9 = !DILocalVariable(name: "a", arg: 1, scope: !4, file: !1, line: 4, type: !7)
!10 = !DILocalVariable(name: "b", arg: 2, scope: !4, file: !1, line: 4, type: !7)
!11 = !DILocalVariable(name: "c", arg: 3, scope: !4, file: !1, line: 4, type: !7)
!12 = !DILocalVariable(name: "d", arg: 4, scope: !4, file: !1, line: 4, type: !7)
!13 = !DILocalVariable(name: "e", arg: 5, scope: !4, file: !1, line: 4, type: !7)
!14 = !DILocalVariable(name: "x", scope: !4, file: !1, line: 5, type: !7)
!15 = distinct !DISubprogram(name: "f1", scope: !1, file: !1, line: 11, type: !5, isLocal: false, isDefinition: true, scopeLine: 11, flags: DIFlagPrototyped, isOptimized: true, variables: !16)
!16 = !{!17, !18, !19, !20, !21, !22}
!17 = !DILocalVariable(name: "a", arg: 1, scope: !15, file: !1, line: 11, type: !7)
!18 = !DILocalVariable(name: "b", arg: 2, scope: !15, file: !1, line: 11, type: !7)
!19 = !DILocalVariable(name: "c", arg: 3, scope: !15, file: !1, line: 11, type: !7)
!20 = !DILocalVariable(name: "d", arg: 4, scope: !15, file: !1, line: 11, type: !7)
!21 = !DILocalVariable(name: "e", arg: 5, scope: !15, file: !1, line: 11, type: !7)
!22 = !DILocalVariable(name: "x", scope: !15, file: !1, line: 12, type: !7)
!23 = !{i32 2, !"Dwarf Version", i32 4}
!24 = !{i32 2, !"Debug Info Version", i32 3}
!25 = !{!"clang version 3.8.0 (trunk 251783) (llvm/trunk 251781)"}
!26 = !DIExpression(DW_OP_deref)
!27 = !DILocation(line: 4, column: 12, scope: !4)
!28 = !DILocation(line: 4, column: 19, scope: !4)
!29 = !DILocation(line: 4, column: 26, scope: !4)
!30 = !DILocation(line: 4, column: 33, scope: !4)
!31 = !DILocation(line: 4, column: 40, scope: !4)
!32 = !DILocation(line: 5, column: 3, scope: !4)
!33 = !DILocation(line: 5, column: 13, scope: !4)
!34 = !DILocation(line: 5, column: 17, scope: !4)
!35 = !DILocation(line: 5, column: 21, scope: !4)
!36 = !DILocation(line: 5, column: 25, scope: !4)
!37 = !DILocation(line: 5, column: 7, scope: !4)
!38 = !{!39, !39, i64 0}
!39 = !{!"int", !40, i64 0}
!40 = !{!"omnipotent char", !41, i64 0}
!41 = !{!"Simple C/C++ TBAA"}
!42 = !DILocation(line: 6, column: 3, scope: !4)
!43 = !DILocation(line: 7, column: 10, scope: !4)
!44 = !DILocation(line: 8, column: 1, scope: !4)
!45 = !DILocation(line: 7, column: 3, scope: !4)
!46 = !DILocation(line: 11, column: 12, scope: !15)
!47 = !DILocation(line: 11, column: 19, scope: !15)
!48 = !DILocation(line: 11, column: 26, scope: !15)
!49 = !DILocation(line: 11, column: 33, scope: !15)
!50 = !DILocation(line: 11, column: 40, scope: !15)
!51 = !DILocation(line: 12, column: 3, scope: !15)
!52 = !DILocation(line: 12, column: 42, scope: !15)
!53 = !DILocation(line: 12, column: 46, scope: !15)
!54 = !DILocation(line: 12, column: 50, scope: !15)
!55 = !DILocation(line: 12, column: 54, scope: !15)
!56 = !DILocation(line: 12, column: 7, scope: !15)
!57 = !DILocation(line: 13, column: 3, scope: !15)
!58 = !DILocation(line: 14, column: 10, scope: !15)
!59 = !DILocation(line: 15, column: 1, scope: !15)
!60 = !DILocation(line: 14, column: 3, scope: !15)
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