mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 11:02:59 +02:00
a2029fa58e
In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
106 lines
4.4 KiB
LLVM
106 lines
4.4 KiB
LLVM
; RUN: llc -filetype=asm -fast-isel=false -O0 < %s | FileCheck %s
|
|
;
|
|
; Generated by:
|
|
; clang -emit-llvm -S -g test.cpp
|
|
|
|
; typedef double fp_t;
|
|
; typedef unsigned long int_t;
|
|
;
|
|
; int_t glb_start = 17;
|
|
; int_t glb_end = 42;
|
|
;
|
|
; int main()
|
|
; {
|
|
; int_t start = glb_start;
|
|
; int_t end = glb_end;
|
|
;
|
|
; fp_t dbl_start = (fp_t) start;
|
|
; fp_t dbl_end = (fp_t) end;
|
|
;
|
|
; return 0;
|
|
; }
|
|
|
|
; SelectionDAG performs CSE on constant pool loads. Make sure line numbers
|
|
; from such nodes are not propagated. Doing so results in oscillating line numbers.
|
|
|
|
; CHECK: .loc 1 12
|
|
; CHECK: .loc 1 13
|
|
; CHECK-NOT: .loc 1 12
|
|
|
|
; ModuleID = 't.cpp'
|
|
source_filename = "test/DebugInfo/X86/isel-cse-line.ll"
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
@glb_start = global i64 17, align 8, !dbg !0
|
|
@glb_end = global i64 42, align 8, !dbg !9
|
|
|
|
define i32 @main() !dbg !16 {
|
|
%1 = alloca i32, align 4
|
|
%2 = alloca i64, align 8
|
|
%3 = alloca i64, align 8
|
|
%4 = alloca double, align 8
|
|
%5 = alloca double, align 8
|
|
store i32 0, i32* %1, align 4
|
|
call void @llvm.dbg.declare(metadata i64* %2, metadata !20, metadata !21), !dbg !22
|
|
%6 = load i64, i64* @glb_start, align 8, !dbg !23
|
|
store i64 %6, i64* %2, align 8, !dbg !22
|
|
call void @llvm.dbg.declare(metadata i64* %3, metadata !24, metadata !21), !dbg !25
|
|
%7 = load i64, i64* @glb_end, align 8, !dbg !26
|
|
store i64 %7, i64* %3, align 8, !dbg !25
|
|
call void @llvm.dbg.declare(metadata double* %4, metadata !27, metadata !21), !dbg !28
|
|
%8 = load i64, i64* %2, align 8, !dbg !29
|
|
%9 = uitofp i64 %8 to double, !dbg !29
|
|
store double %9, double* %4, align 8, !dbg !28
|
|
call void @llvm.dbg.declare(metadata double* %5, metadata !30, metadata !21), !dbg !31
|
|
%10 = load i64, i64* %3, align 8, !dbg !32
|
|
%11 = uitofp i64 %10 to double, !dbg !32
|
|
store double %11, double* %5, align 8, !dbg !31
|
|
ret i32 0, !dbg !33
|
|
}
|
|
|
|
; Function Attrs: nounwind readnone
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
|
|
|
|
attributes #0 = { nounwind readnone }
|
|
|
|
!llvm.dbg.cu = !{!2}
|
|
!llvm.module.flags = !{!13, !14}
|
|
!llvm.ident = !{!15}
|
|
|
|
!0 = distinct !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
|
|
!1 = !DIGlobalVariable(name: "glb_start", scope: !2, file: !3, line: 4, type: !11, isLocal: false, isDefinition: true)
|
|
!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 3.9.0 (trunk 268246)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !5, globals: !8)
|
|
!3 = !DIFile(filename: "/home/wpieb/test/D12094.cpp", directory: "/home/wpieb/build/llvm/trunk/llvm-RelWithDebInfo")
|
|
!4 = !{}
|
|
!5 = !{!6}
|
|
!6 = !DIDerivedType(tag: DW_TAG_typedef, name: "fp_t", file: !3, line: 1, baseType: !7)
|
|
!7 = !DIBasicType(name: "double", size: 64, align: 64, encoding: DW_ATE_float)
|
|
!8 = !{!0, !9}
|
|
!9 = distinct !DIGlobalVariableExpression(var: !10, expr: !DIExpression())
|
|
!10 = !DIGlobalVariable(name: "glb_end", scope: !2, file: !3, line: 5, type: !11, isLocal: false, isDefinition: true)
|
|
!11 = !DIDerivedType(tag: DW_TAG_typedef, name: "int_t", file: !3, line: 2, baseType: !12)
|
|
!12 = !DIBasicType(name: "long unsigned int", size: 64, align: 64, encoding: DW_ATE_unsigned)
|
|
!13 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!14 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!15 = !{!"clang version 3.9.0 (trunk 268246)"}
|
|
!16 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 7, type: !17, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: false, unit: !2, retainedNodes: !4)
|
|
!17 = !DISubroutineType(types: !18)
|
|
!18 = !{!19}
|
|
!19 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!20 = !DILocalVariable(name: "start", scope: !16, file: !3, line: 9, type: !11)
|
|
!21 = !DIExpression()
|
|
!22 = !DILocation(line: 9, column: 9, scope: !16)
|
|
!23 = !DILocation(line: 9, column: 17, scope: !16)
|
|
!24 = !DILocalVariable(name: "end", scope: !16, file: !3, line: 10, type: !11)
|
|
!25 = !DILocation(line: 10, column: 9, scope: !16)
|
|
!26 = !DILocation(line: 10, column: 17, scope: !16)
|
|
!27 = !DILocalVariable(name: "dbl_start", scope: !16, file: !3, line: 12, type: !6)
|
|
!28 = !DILocation(line: 12, column: 8, scope: !16)
|
|
!29 = !DILocation(line: 12, column: 27, scope: !16)
|
|
!30 = !DILocalVariable(name: "dbl_end", scope: !16, file: !3, line: 13, type: !6)
|
|
!31 = !DILocation(line: 13, column: 8, scope: !16)
|
|
!32 = !DILocation(line: 13, column: 27, scope: !16)
|
|
!33 = !DILocation(line: 15, column: 3, scope: !16)
|
|
|