mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
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
130 lines
5.9 KiB
LLVM
130 lines
5.9 KiB
LLVM
; RUN: opt -S -globalopt < %s | FileCheck %s
|
|
source_filename = "array.c"
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
%struct.mystruct = type { i32, i64 }
|
|
|
|
; Generated from:
|
|
;
|
|
; static long double array[2];
|
|
; void __attribute__((nodebug)) foo(int in) { array[0] = in; }
|
|
; void __attribute__((nodebug)) bar(int in) { array[1] = in; }
|
|
; int main(int argc, char **argv)
|
|
; {
|
|
; foo(argv[0][1]);
|
|
; bar(argv[0][1]);
|
|
; return (array[0] + array[1]) > 0;
|
|
; }
|
|
;
|
|
; using clang -O0 -g2 -S -emit-llvm
|
|
|
|
@array = internal global [2 x x86_fp80] zeroinitializer, align 16, !dbg !0
|
|
|
|
; CHECK: @array.0 = internal unnamed_addr global x86_fp80 0xK00000000000000000000, align 16, !dbg ![[EL0:.*]]
|
|
; CHECK: @array.1 = internal unnamed_addr global x86_fp80 0xK00000000000000000000, align 16, !dbg ![[EL1:.*]]
|
|
;
|
|
; CHECK: ![[EL0]] = !DIGlobalVariableExpression(var: ![[VAR:.*]], expr: !DIExpression(DW_OP_LLVM_fragment, 0, 128))
|
|
; CHECK: ![[VAR]] = distinct !DIGlobalVariable(name: "array"
|
|
; CHECK: ![[EL1]] = !DIGlobalVariableExpression(var: ![[VAR]], expr: !DIExpression(DW_OP_LLVM_fragment, 128, 128))
|
|
|
|
; Function Attrs: noinline nounwind optnone uwtable
|
|
define void @foo(i32 %in) #0 {
|
|
entry:
|
|
%in.addr = alloca i32, align 4
|
|
store i32 %in, i32* %in.addr, align 4
|
|
%0 = load i32, i32* %in.addr, align 4
|
|
%conv = sitofp i32 %0 to x86_fp80
|
|
store x86_fp80 %conv, x86_fp80* getelementptr inbounds ([2 x x86_fp80], [2 x x86_fp80]* @array, i64 0, i64 0), align 16
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: noinline nounwind optnone uwtable
|
|
define void @bar(i32 %in) #0 {
|
|
entry:
|
|
%in.addr = alloca i32, align 4
|
|
store i32 %in, i32* %in.addr, align 4
|
|
%0 = load i32, i32* %in.addr, align 4
|
|
%conv = sitofp i32 %0 to x86_fp80
|
|
store x86_fp80 %conv, x86_fp80* getelementptr inbounds ([2 x x86_fp80], [2 x x86_fp80]* @array, i64 0, i64 1), align 16
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: noinline nounwind optnone uwtable
|
|
define i32 @main(i32 %argc, i8** %argv) #0 !dbg !14 {
|
|
entry:
|
|
%retval = alloca i32, align 4
|
|
%argc.addr = alloca i32, align 4
|
|
%argv.addr = alloca i8**, align 8
|
|
store i32 0, i32* %retval, align 4
|
|
store i32 %argc, i32* %argc.addr, align 4
|
|
call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !21, metadata !DIExpression()), !dbg !22
|
|
store i8** %argv, i8*** %argv.addr, align 8
|
|
call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !23, metadata !DIExpression()), !dbg !24
|
|
%0 = load i8**, i8*** %argv.addr, align 8, !dbg !25
|
|
%arrayidx = getelementptr inbounds i8*, i8** %0, i64 0, !dbg !25
|
|
%1 = load i8*, i8** %arrayidx, align 8, !dbg !25
|
|
%arrayidx1 = getelementptr inbounds i8, i8* %1, i64 1, !dbg !25
|
|
%2 = load i8, i8* %arrayidx1, align 1, !dbg !25
|
|
%conv = sext i8 %2 to i32, !dbg !25
|
|
call void @foo(i32 %conv), !dbg !26
|
|
%3 = load i8**, i8*** %argv.addr, align 8, !dbg !27
|
|
%arrayidx2 = getelementptr inbounds i8*, i8** %3, i64 0, !dbg !27
|
|
%4 = load i8*, i8** %arrayidx2, align 8, !dbg !27
|
|
%arrayidx3 = getelementptr inbounds i8, i8* %4, i64 1, !dbg !27
|
|
%5 = load i8, i8* %arrayidx3, align 1, !dbg !27
|
|
%conv4 = sext i8 %5 to i32, !dbg !27
|
|
call void @bar(i32 %conv4), !dbg !28
|
|
%6 = load x86_fp80, x86_fp80* getelementptr inbounds ([2 x x86_fp80], [2 x x86_fp80]* @array, i64 0, i64 0), align 16, !dbg !29
|
|
%7 = load x86_fp80, x86_fp80* getelementptr inbounds ([2 x x86_fp80], [2 x x86_fp80]* @array, i64 0, i64 1), align 16, !dbg !30
|
|
%add = fadd x86_fp80 %6, %7, !dbg !31
|
|
%cmp = fcmp ogt x86_fp80 %add, 0xK00000000000000000000, !dbg !32
|
|
%conv5 = zext i1 %cmp to i32, !dbg !32
|
|
ret i32 %conv5, !dbg !33
|
|
}
|
|
|
|
; Function Attrs: nounwind readnone speculatable
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
|
|
|
|
attributes #0 = { noinline nounwind optnone uwtable }
|
|
attributes #1 = { nounwind readnone speculatable }
|
|
|
|
!llvm.dbg.cu = !{!2}
|
|
!llvm.module.flags = !{!10, !11, !12}
|
|
!llvm.ident = !{!13}
|
|
|
|
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
|
|
!1 = distinct !DIGlobalVariable(name: "array", scope: !2, file: !3, line: 1, type: !6, isLocal: true, isDefinition: true)
|
|
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 7.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
|
|
!3 = !DIFile(filename: "array.c", directory: "/")
|
|
!4 = !{}
|
|
!5 = !{!0}
|
|
!6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 256, elements: !8)
|
|
!7 = !DIBasicType(name: "long double", size: 128, encoding: DW_ATE_float)
|
|
!8 = !{!9}
|
|
!9 = !DISubrange(count: 2)
|
|
!10 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!11 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!12 = !{i32 1, !"wchar_size", i32 4}
|
|
!13 = !{!"clang version 7.0.0"}
|
|
!14 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 4, type: !15, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false, unit: !2, retainedNodes: !4)
|
|
!15 = !DISubroutineType(types: !16)
|
|
!16 = !{!17, !17, !18}
|
|
!17 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
|
|
!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
|
|
!19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !20, size: 64)
|
|
!20 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
|
|
!21 = !DILocalVariable(name: "argc", arg: 1, scope: !14, file: !3, line: 4, type: !17)
|
|
!22 = !DILocation(line: 4, column: 14, scope: !14)
|
|
!23 = !DILocalVariable(name: "argv", arg: 2, scope: !14, file: !3, line: 4, type: !18)
|
|
!24 = !DILocation(line: 4, column: 27, scope: !14)
|
|
!25 = !DILocation(line: 6, column: 7, scope: !14)
|
|
!26 = !DILocation(line: 6, column: 3, scope: !14)
|
|
!27 = !DILocation(line: 7, column: 7, scope: !14)
|
|
!28 = !DILocation(line: 7, column: 3, scope: !14)
|
|
!29 = !DILocation(line: 8, column: 11, scope: !14)
|
|
!30 = !DILocation(line: 8, column: 22, scope: !14)
|
|
!31 = !DILocation(line: 8, column: 20, scope: !14)
|
|
!32 = !DILocation(line: 8, column: 32, scope: !14)
|
|
!33 = !DILocation(line: 8, column: 3, scope: !14)
|