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llvm-mirror/test/DebugInfo/AMDGPU/variable-locations.ll
Shiva Chen a2029fa58e [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 
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
2018-05-09 02:40:45 +00:00

115 lines
5.7 KiB
LLVM
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; RUN: llc -O0 -mtriple=amdgcn-amd-amdhsa -mcpu=fiji -verify-machineinstrs -filetype=obj < %s | llvm-dwarfdump -v -debug-info - | FileCheck %s
; LLVM IR generated with the following command and OpenCL source:
;
; $clang -cl-std=CL2.0 -g -O0 -target amdgcn-amd-amdhsa -S -emit-llvm <path-to-file>
;
; global int GlobA;
; global int GlobB;
;
; kernel void kernel1(unsigned int ArgN, global int addrspace(5)*ArgA, global int addrspace(5)*ArgB) {
; ArgA[ArgN] += ArgB[ArgN];
; }
declare void @llvm.dbg.declare(metadata, metadata, metadata)
; CHECK: {{.*}}DW_TAG_variable
; CHECK-NEXT: DW_AT_name {{.*}}"GlobA"
; CHECK-NEXT: DW_AT_type
; CHECK-NEXT: DW_AT_external
; CHECK-NEXT: DW_AT_decl_file
; CHECK-NEXT: DW_AT_decl_line
; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_addr 0x0)
@GlobA = common addrspace(1) global i32 0, align 4, !dbg !0
; CHECK: {{.*}}DW_TAG_variable
; CHECK-NEXT: DW_AT_name {{.*}}"GlobB"
; CHECK-NEXT: DW_AT_type
; CHECK-NEXT: DW_AT_external
; CHECK-NEXT: DW_AT_decl_file
; CHECK-NEXT: DW_AT_decl_line
; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_addr 0x0)
@GlobB = common addrspace(1) global i32 0, align 4, !dbg !6
; CHECK: {{.*}}DW_TAG_subprogram
; CHECK: DW_AT_frame_base [DW_FORM_block1] (DW_OP_reg9 SGPR9)
define amdgpu_kernel void @kernel1(
; CHECK: {{.*}}DW_TAG_formal_parameter
; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_fbreg +4, DW_OP_constu 0x1, DW_OP_swap, DW_OP_xderef)
; CHECK-NEXT: DW_AT_name {{.*}}"ArgN"
i32 %ArgN,
; CHECK: {{.*}}DW_TAG_formal_parameter
; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_fbreg +8, DW_OP_constu 0x1, DW_OP_swap, DW_OP_xderef)
; CHECK-NEXT: DW_AT_name {{.*}}"ArgA"
i32 addrspace(1)* %ArgA,
; CHECK: {{.*}}DW_TAG_formal_parameter
; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_fbreg +16, DW_OP_constu 0x1, DW_OP_swap, DW_OP_xderef)
; CHECK-NEXT: DW_AT_name {{.*}}"ArgB"
i32 addrspace(1)* %ArgB) !dbg !13 {
entry:
%ArgN.addr = alloca i32, align 4, addrspace(5)
%ArgA.addr = alloca i32 addrspace(1)*, align 4, addrspace(5)
%ArgB.addr = alloca i32 addrspace(1)*, align 4, addrspace(5)
store i32 %ArgN, i32 addrspace(5)* %ArgN.addr, align 4
call void @llvm.dbg.declare(metadata i32 addrspace(5)* %ArgN.addr, metadata !22, metadata !23), !dbg !24
store i32 addrspace(1)* %ArgA, i32 addrspace(1)* addrspace(5)* %ArgA.addr, align 4
call void @llvm.dbg.declare(metadata i32 addrspace(1)* addrspace(5)* %ArgA.addr, metadata !25, metadata !23), !dbg !26
store i32 addrspace(1)* %ArgB, i32 addrspace(1)* addrspace(5)* %ArgB.addr, align 4
call void @llvm.dbg.declare(metadata i32 addrspace(1)* addrspace(5)* %ArgB.addr, metadata !27, metadata !23), !dbg !28
%0 = load i32 addrspace(1)*, i32 addrspace(1)* addrspace(5)* %ArgB.addr, align 4, !dbg !29
%1 = load i32, i32 addrspace(5)* %ArgN.addr, align 4, !dbg !30
%idxprom = zext i32 %1 to i64, !dbg !29
%arrayidx = getelementptr inbounds i32, i32 addrspace(1)* %0, i64 %idxprom, !dbg !29
%2 = load i32, i32 addrspace(1)* %arrayidx, align 4, !dbg !29
%3 = load i32 addrspace(1)*, i32 addrspace(1)* addrspace(5)* %ArgA.addr, align 4, !dbg !31
%4 = load i32, i32 addrspace(5)* %ArgN.addr, align 4, !dbg !32
%idxprom1 = zext i32 %4 to i64, !dbg !31
%arrayidx2 = getelementptr inbounds i32, i32 addrspace(1)* %3, i64 %idxprom1, !dbg !31
%5 = load i32, i32 addrspace(1)* %arrayidx2, align 4, !dbg !33
%add = add nsw i32 %5, %2, !dbg !33
store i32 %add, i32 addrspace(1)* %arrayidx2, align 4, !dbg !33
ret void, !dbg !34
}
!llvm.dbg.cu = !{!2}
!opencl.ocl.version = !{!9}
!llvm.module.flags = !{!10, !11}
!llvm.ident = !{!12}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "GlobA", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 5.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
!3 = !DIFile(filename: "variable-locations.cl", directory: "/some/random/directory")
!4 = !{}
!5 = !{!0, !6}
!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
!7 = distinct !DIGlobalVariable(name: "GlobB", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!9 = !{i32 2, i32 0}
!10 = !{i32 2, !"Dwarf Version", i32 2}
!11 = !{i32 2, !"Debug Info Version", i32 3}
!12 = !{!"clang version 5.0.0"}
!13 = distinct !DISubprogram(name: "kernel1", scope: !3, file: !3, line: 4, type: !14, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, unit: !2, retainedNodes: !4)
!14 = !DISubroutineType(types: !15)
!15 = !{null, !16, !17, !17}
!16 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
!17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64)
!18 = !{i32 0, i32 1, i32 1}
!19 = !{!"none", !"none", !"none"}
!20 = !{!"uint", !"int addrspace(5)*", !"int addrspace(5)*"}
!21 = !{!"", !"", !""}
!22 = !DILocalVariable(name: "ArgN", arg: 1, scope: !13, file: !3, line: 4, type: !16)
!23 = !DIExpression(DW_OP_constu, 1, DW_OP_swap, DW_OP_xderef)
!24 = !DILocation(line: 4, column: 34, scope: !13)
!25 = !DILocalVariable(name: "ArgA", arg: 2, scope: !13, file: !3, line: 4, type: !17)
!26 = !DILocation(line: 4, column: 52, scope: !13)
!27 = !DILocalVariable(name: "ArgB", arg: 3, scope: !13, file: !3, line: 4, type: !17)
!28 = !DILocation(line: 4, column: 70, scope: !13)
!29 = !DILocation(line: 5, column: 17, scope: !13)
!30 = !DILocation(line: 5, column: 22, scope: !13)
!31 = !DILocation(line: 5, column: 3, scope: !13)
!32 = !DILocation(line: 5, column: 8, scope: !13)
!33 = !DILocation(line: 5, column: 14, scope: !13)
!34 = !DILocation(line: 6, column: 1, scope: !13)
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