You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
2.6 KiB
63 lines
2.6 KiB
4 months ago
|
; RUN: llc -dwarf-version=4 -filetype=obj -O0 \
|
||
|
|
; RUN: -mtriple=x86_64-unknown-linux-gnu < %s \
|
||
|
|
; RUN: | llvm-dwarfdump -v - | FileCheck %s
|
||
|
|
|
||
|
|
; Verify that the empty DW_OP_piece operations that are created for the
|
||
|
|
; optimized-out struct fields `foo' and `baz' are emitted before their
|
||
|
|
; succeeding fields' symbol location expressions.
|
||
|
|
|
||
|
|
; Test file based on foo.c:
|
||
|
|
;
|
||
|
|
; struct {
|
||
|
|
; long foo;
|
||
|
|
; void *bar;
|
||
|
|
; long baz;
|
||
|
|
; void *qux;
|
||
|
|
; } static var;
|
||
|
|
;
|
||
|
|
; void *ptr;
|
||
|
|
;
|
||
|
|
; int main() {
|
||
|
|
; if (var.foo == 0)
|
||
|
|
; var.bar = var.qux = ptr;
|
||
|
|
; return 0;
|
||
|
|
; }
|
||
|
|
;
|
||
|
|
; which was built using:
|
||
|
|
;
|
||
|
|
; clang -O0 -g2 -S -emit-llvm foo.c -o foo.ll
|
||
|
|
; opt -S -globalopt foo.ll -o foo.opt.ll
|
||
|
|
|
||
|
|
; CHECK: DW_AT_name {{.*}}"var"
|
||
|
|
; CHECK: DW_AT_location [DW_FORM_exprloc] (DW_OP_piece 0x8, DW_OP_addr 0x0, DW_OP_piece 0x8, DW_OP_piece 0x8, DW_OP_addr 0x0, DW_OP_piece 0x8)
|
||
|
|
|
||
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
||
|
|
target triple = "x86_64-unknown-linux-gnu"
|
||
|
|
|
||
|
|
@var.1 = internal unnamed_addr global i8* null, align 8, !dbg !0
|
||
|
|
@var.3 = internal unnamed_addr global i8* null, align 8, !dbg !15
|
||
|
|
|
||
|
|
!llvm.dbg.cu = !{!2}
|
||
|
|
!llvm.module.flags = !{!16, !17}
|
||
|
|
!llvm.ident = !{!18}
|
||
|
|
|
||
|
|
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression(DW_OP_LLVM_fragment, 64, 64))
|
||
|
|
!1 = distinct !DIGlobalVariable(name: "var", scope: !2, file: !3, line: 15, type: !7, 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: "foo.c", directory: "/")
|
||
|
|
!4 = !{}
|
||
|
|
!5 = !{!6}
|
||
|
|
!6 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
|
||
|
|
!7 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 10, size: 256, elements: !8)
|
||
|
|
!8 = !{!9, !11, !13, !14}
|
||
|
|
!9 = !DIDerivedType(tag: DW_TAG_member, name: "foo", scope: !7, file: !3, line: 11, baseType: !10, size: 64)
|
||
|
|
!10 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
|
||
|
|
!11 = !DIDerivedType(tag: DW_TAG_member, name: "bar", scope: !7, file: !3, line: 12, baseType: !12, size: 64, offset: 64)
|
||
|
|
!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
|
||
|
|
!13 = !DIDerivedType(tag: DW_TAG_member, name: "baz", scope: !7, file: !3, line: 13, baseType: !10, size: 64, offset: 128)
|
||
|
|
!14 = !DIDerivedType(tag: DW_TAG_member, name: "qux", scope: !7, file: !3, line: 14, baseType: !12, size: 64, offset: 192)
|
||
|
|
!15 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression(DW_OP_LLVM_fragment, 192, 64))
|
||
|
|
!16 = !{i32 2, !"Dwarf Version", i32 4}
|
||
|
|
!17 = !{i32 2, !"Debug Info Version", i32 3}
|
||
|
|
!18 = !{!"clang version 7.0.0"}
|