119 lines
4.9 KiB
YAML
119 lines
4.9 KiB
YAML
# RUN: llc -emit-call-site-info -start-after=livedebugvalues -filetype=obj %s -o -| llvm-dwarfdump -| FileCheck %s
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# Based on the following reproducer:
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#
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# #include <stdint.h>
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#
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# extern uint32_t value32(void);
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# extern uint64_t value64(void);
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# extern void call32(uint32_t);
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# extern void call64(uint64_t);
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#
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# uint32_t test_sub_reg() {
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# uint32_t local = value32();
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# call64(local);
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# return local;
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# }
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--- |
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; ModuleID = 'ext.c'
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source_filename = "ext.c"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: minsize nounwind optsize uwtable
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define i32 @test_sub_reg() #0 !dbg !22 {
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entry:
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%call = tail call i32 @value32(), !dbg !29
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call void @llvm.dbg.value(metadata i32 %call, metadata !28, metadata !DIExpression()), !dbg !30
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%conv = zext i32 %call to i64, !dbg !31
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tail call void @call64(i64 %conv), !dbg !31
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ret i32 %call, !dbg !32
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}
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declare !dbg !4 i32 @value32()
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declare !dbg !8 void @call64(i64)
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declare !dbg !12 i64 @value64()
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declare !dbg !15 void @call32(i32)
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { minsize nounwind optsize uwtable }
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attributes #1 = { nounwind readnone speculatable willreturn }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!18, !19, !20}
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!llvm.ident = !{!21}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
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!1 = !DIFile(filename: "ext.c", directory: "/")
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!2 = !{}
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!3 = !{!4, !8, !12, !15}
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!4 = !DISubprogram(name: "value32", scope: !1, file: !1, line: 3, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!5 = !DISubroutineType(types: !6)
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!6 = !{!7}
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!7 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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!8 = !DISubprogram(name: "call64", scope: !1, file: !1, line: 6, type: !9, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!9 = !DISubroutineType(types: !10)
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!10 = !{null, !11}
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!11 = !DIBasicType(name: "long unsigned int", size: 64, encoding: DW_ATE_unsigned)
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!12 = !DISubprogram(name: "value64", scope: !1, file: !1, line: 4, type: !13, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!13 = !DISubroutineType(types: !14)
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!14 = !{!11}
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!15 = !DISubprogram(name: "call32", scope: !1, file: !1, line: 5, type: !16, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!16 = !DISubroutineType(types: !17)
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!17 = !{null, !7}
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!18 = !{i32 2, !"Dwarf Version", i32 4}
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!19 = !{i32 2, !"Debug Info Version", i32 3}
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!20 = !{i32 1, !"wchar_size", i32 4}
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!21 = !{!"clang version 10.0.0"}
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!22 = distinct !DISubprogram(name: "test_sub_reg", scope: !1, file: !1, line: 8, type: !23, scopeLine: 8, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !27)
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!23 = !DISubroutineType(types: !24)
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!24 = !{!25}
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!25 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint32_t", file: !26, line: 52, baseType: !7)
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!26 = !DIFile(filename: "/usr/include/stdint.h", directory: "")
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!27 = !{!28}
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!28 = !DILocalVariable(name: "local", scope: !22, file: !1, line: 9, type: !25)
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!29 = !DILocation(line: 9, scope: !22)
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!30 = !DILocation(line: 0, scope: !22)
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!31 = !DILocation(line: 10, scope: !22)
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!32 = !DILocation(line: 11, scope: !22)
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...
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---
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name: test_sub_reg
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tracksRegLiveness: true
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callSites:
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- { bb: 0, offset: 3 }
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- { bb: 0, offset: 7, fwdArgRegs:
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- { arg: 0, reg: '$rdi' } }
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body: |
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bb.0.entry:
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liveins: $rbx
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frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp, debug-location !29
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CFI_INSTRUCTION def_cfa_offset 16
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CFI_INSTRUCTION offset $rbx, -16
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CALL64pcrel32 @value32, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !29
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$ebx = MOV32rr $eax, debug-location !29
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DBG_VALUE $ebx, $noreg, !28, !DIExpression(), debug-location !30
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renamable $edi = MOV32rr $ebx, implicit-def $rdi, debug-location !31
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CALL64pcrel32 @call64, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, debug-location !31
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$eax = MOV32rr killed $ebx, debug-location !32
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$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !32
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CFI_INSTRUCTION def_cfa_offset 8, debug-location !32
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RETQ killed $eax, debug-location !32
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...
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# Verify that a call site value is emitted for the 64-bit parameter that is
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# loaded using the zero-extending MOV32rr.
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# CHECK: DW_TAG_GNU_call_site_parameter
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# CHECK-NEXT: DW_AT_location (DW_OP_reg5 RDI)
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# CHECK-NEXT: DW_AT_GNU_call_site_value (DW_OP_breg3 RBX+0)
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