[llvm] 6d1c40c - [NFC][DwarfDebug] Add test for variables with a single location which
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Mon May 11 01:47:10 PDT 2020
Author: OCHyams
Date: 2020-05-11T09:36:49+01:00
New Revision: 6d1c40c171e22e32da796f6c9a3287018ac116c2
URL: https://github.com/llvm/llvm-project/commit/6d1c40c171e22e32da796f6c9a3287018ac116c2
DIFF: https://github.com/llvm/llvm-project/commit/6d1c40c171e22e32da796f6c9a3287018ac116c2.diff
LOG: [NFC][DwarfDebug] Add test for variables with a single location which
don't span their entire scope.
Reviewed By: aprantl, vsk
Differential Revision: https://reviews.llvm.org/D79573
Added:
llvm/test/DebugInfo/X86/location-range.mir
Modified:
Removed:
################################################################################
diff --git a/llvm/test/DebugInfo/X86/location-range.mir b/llvm/test/DebugInfo/X86/location-range.mir
new file mode 100644
index 000000000000..12492ce83282
--- /dev/null
+++ b/llvm/test/DebugInfo/X86/location-range.mir
@@ -0,0 +1,156 @@
+# RUN: llc -start-after=livedebugvalues --filetype=obj %s -o - \
+# RUN: | llvm-dwarfdump - | FileCheck %s
+#
+# Generated with opt -sroa, llc -stop-after=livedebugvalues, with some metadata
+# removed by hand:
+# long a, b, c;
+# long funone() {
+# unsigned localone;
+# if (c)
+# return b;
+# // Location should start here.
+# localone = 0;
+# return a;
+# }
+#
+# short funtwo() {
+# union {
+# char b[2];
+# short c;
+# } localtwo;
+# {
+# // Location should start here.
+# memcpy(localtwo.b, 0, 2);
+# }
+# return localtwo.c;
+# }
+#
+# Check that the local variables each have a location range which reflects the
+# fact that they're both unavailable at the start of the functions.
+#
+# CHECK: DW_TAG_subprogram
+# CHECK: DW_AT_name ("funone")
+# CHECK: DW_TAG_variable
+# CHECK: DW_AT_location
+# CHECK-NEXT: [0x{{[0-9a-z]+}}, 0x{{[0-9a-z]+}}):
+# CHECK-NEXT: DW_AT_name ("localone")
+
+# CHECK: DW_TAG_subprogram
+# CHECK: DW_AT_name ("funtwo")
+# CHECK: DW_TAG_variable
+# CHECK: DW_AT_location
+# CHECK-NEXT: [0x{{[0-9a-z]+}}, 0x{{[0-9a-z]+}}):
+# CHECK-NEXT: DW_AT_name ("localtwo")
+
+--- |
+ target triple = "x86_64-unknown-linux-gnu"
+
+ @c = dso_local global i64 0, align 8, !dbg !0
+ @b = dso_local global i64 0, align 8, !dbg !9
+ @a = dso_local global i64 0, align 8, !dbg !6
+
+ define dso_local i64 @funone() !dbg !15 {
+ entry:
+ %0 = load i64, i64* @c, align 8, !dbg !21
+ %tobool = icmp ne i64 %0, 0, !dbg !21
+ br i1 %tobool, label %if.then, label %if.end, !dbg !27
+
+ if.then: ; preds = %entry
+ %1 = load i64, i64* @b, align 8, !dbg !21
+ br label %cleanup, !dbg !21
+
+ if.end: ; preds = %entry
+ call void @llvm.dbg.value(metadata i32 0, metadata !19, metadata !DIExpression()), !dbg !27
+ %2 = load i64, i64* @a, align 8, !dbg !27
+ br label %cleanup, !dbg !27
+
+ cleanup: ; preds = %if.end, %if.then
+ %retval.0 = phi i64 [ %1, %if.then ], [ %2, %if.end ], !dbg !27
+ ret i64 %retval.0, !dbg !27
+ }
+
+ define dso_local signext i16 @funtwo() !dbg !34 {
+ entry:
+ %localtwo.sroa.0.0.copyload = load i16, i16* null, align 1, !dbg !48
+ call void @llvm.dbg.value(metadata i16 %localtwo.sroa.0.0.copyload, metadata !39, metadata !DIExpression()), !dbg !51
+ ret i16 %localtwo.sroa.0.0.copyload, !dbg !51
+ }
+
+ declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
+ declare void @llvm.dbg.value(metadata, metadata, metadata)
+
+ !llvm.dbg.cu = !{!2}
+ !llvm.module.flags = !{!11, !12, !13}
+ !llvm.ident = !{!14}
+
+ !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
+ !1 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
+ !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None)
+ !3 = !DIFile(filename: "test.c", directory: "/")
+ !4 = !{}
+ !5 = !{!6, !9, !0}
+ !6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
+ !7 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
+ !8 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
+ !9 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression())
+ !10 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
+ !11 = !{i32 7, !"Dwarf Version", i32 4}
+ !12 = !{i32 2, !"Debug Info Version", i32 3}
+ !13 = !{i32 1, !"wchar_size", i32 4}
+ !14 = !{!"clang version 11.0.0"}
+ !15 = distinct !DISubprogram(name: "funone", scope: !3, file: !3, line: 3, type: !16, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !18)
+ !16 = !DISubroutineType(types: !17)
+ !17 = !{!8}
+ !18 = !{!19}
+ !19 = !DILocalVariable(name: "localone", scope: !15, file: !3, line: 4, type: !20)
+ !20 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
+ !21 = !DILocation(line: 5, column: 7, scope: !22)
+ !22 = distinct !DILexicalBlock(scope: !15, file: !3, line: 5, column: 7)
+ !27 = !DILocation(line: 5, column: 7, scope: !15)
+ !34 = distinct !DISubprogram(name: "funtwo", scope: !3, file: !3, line: 13, type: !35, scopeLine: 13, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !38)
+ !35 = !DISubroutineType(types: !36)
+ !36 = !{!37}
+ !37 = !DIBasicType(name: "short", size: 16, encoding: DW_ATE_signed)
+ !38 = !{!39}
+ !39 = !DILocalVariable(name: "localtwo", scope: !34, file: !3, line: 17, type: !40)
+ !40 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !34, file: !3, line: 14, size: 16, elements: !41)
+ !41 = !{!42, !47}
+ !42 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !40, file: !3, line: 15, baseType: !43, size: 16)
+ !43 = !DICompositeType(tag: DW_TAG_array_type, baseType: !44, size: 16, elements: !45)
+ !44 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+ !45 = !{!46}
+ !46 = !DISubrange(count: 2)
+ !47 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !40, file: !3, line: 16, baseType: !37, size: 16)
+ !48 = !DILocation(line: 20, column: 5, scope: !49)
+ !49 = distinct !DILexicalBlock(scope: !34, file: !3, line: 18, column: 3)
+ !51 = !DILocation(line: 22, column: 3, scope: !34)
+
+...
+---
+name: funone
+body: |
+ bb.0.entry:
+ successors: %bb.1(0x50000000), %bb.2(0x30000000)
+
+ CMP64mi8 $rip, 1, $noreg, @c, $noreg, 0, implicit-def $eflags, debug-location !21 :: (dereferenceable load 8 from @c)
+ JCC_1 %bb.2, 4, implicit killed $eflags, debug-location !27
+
+ bb.1.if.then:
+ renamable $rax = MOV64rm $rip, 1, $noreg, @b, $noreg, debug-location !21 :: (dereferenceable load 8 from @b)
+ RETQ $rax, debug-location !27
+
+ bb.2.if.end:
+ DBG_VALUE 0, $noreg, !19, !DIExpression(), debug-location !27
+ renamable $rax = MOV64rm $rip, 1, $noreg, @a, $noreg, debug-location !27 :: (dereferenceable load 8 from @a)
+ RETQ $rax, debug-location !27
+
+...
+---
+name: funtwo
+body: |
+ bb.0.entry:
+ $eax = MOVZX32rm16 $noreg, 1, $noreg, 0, $noreg, debug-location !48 :: (load 2 from `i16* null`, align 1)
+ DBG_VALUE $ax, $noreg, !39, !DIExpression(), debug-location !51
+ RETQ $ax, debug-location !51
+
+...
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