1# RUN: llc -emit-call-site-info -start-after=livedebugvalues -filetype=obj %s -o -| llvm-dwarfdump -| FileCheck %s 2 3# Based on the following reproducer: 4# 5# #include <stdint.h> 6# 7# extern uint32_t value32(void); 8# extern uint64_t value64(void); 9# extern void call32(uint32_t); 10# extern void call64(uint64_t); 11# 12# uint32_t test_sub_reg() { 13# uint32_t local = value32(); 14# call64(local); 15# return local; 16# } 17 18--- | 19 ; ModuleID = 'ext.c' 20 source_filename = "ext.c" 21 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 22 target triple = "x86_64-unknown-linux-gnu" 23 24 ; Function Attrs: minsize nounwind optsize uwtable 25 define i32 @test_sub_reg() #0 !dbg !22 { 26 entry: 27 %call = tail call i32 @value32(), !dbg !29 28 call void @llvm.dbg.value(metadata i32 %call, metadata !28, metadata !DIExpression()), !dbg !30 29 %conv = zext i32 %call to i64, !dbg !31 30 tail call void @call64(i64 %conv), !dbg !31 31 ret i32 %call, !dbg !32 32 } 33 34 declare !dbg !4 i32 @value32() 35 36 declare !dbg !8 void @call64(i64) 37 38 declare !dbg !12 i64 @value64() 39 40 declare !dbg !15 void @call32(i32) 41 42 ; Function Attrs: nounwind readnone speculatable willreturn 43 declare void @llvm.dbg.value(metadata, metadata, metadata) #1 44 45 attributes #0 = { minsize nounwind optsize uwtable } 46 attributes #1 = { nounwind readnone speculatable willreturn } 47 48 !llvm.dbg.cu = !{!0} 49 !llvm.module.flags = !{!18, !19, !20} 50 !llvm.ident = !{!21} 51 52 !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) 53 !1 = !DIFile(filename: "ext.c", directory: "/") 54 !2 = !{} 55 !3 = !{!4, !8, !12, !15} 56 !4 = !DISubprogram(name: "value32", scope: !1, file: !1, line: 3, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) 57 !5 = !DISubroutineType(types: !6) 58 !6 = !{!7} 59 !7 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) 60 !8 = !DISubprogram(name: "call64", scope: !1, file: !1, line: 6, type: !9, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) 61 !9 = !DISubroutineType(types: !10) 62 !10 = !{null, !11} 63 !11 = !DIBasicType(name: "long unsigned int", size: 64, encoding: DW_ATE_unsigned) 64 !12 = !DISubprogram(name: "value64", scope: !1, file: !1, line: 4, type: !13, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) 65 !13 = !DISubroutineType(types: !14) 66 !14 = !{!11} 67 !15 = !DISubprogram(name: "call32", scope: !1, file: !1, line: 5, type: !16, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) 68 !16 = !DISubroutineType(types: !17) 69 !17 = !{null, !7} 70 !18 = !{i32 2, !"Dwarf Version", i32 4} 71 !19 = !{i32 2, !"Debug Info Version", i32 3} 72 !20 = !{i32 1, !"wchar_size", i32 4} 73 !21 = !{!"clang version 10.0.0"} 74 !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) 75 !23 = !DISubroutineType(types: !24) 76 !24 = !{!25} 77 !25 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint32_t", file: !26, line: 52, baseType: !7) 78 !26 = !DIFile(filename: "/usr/include/stdint.h", directory: "") 79 !27 = !{!28} 80 !28 = !DILocalVariable(name: "local", scope: !22, file: !1, line: 9, type: !25) 81 !29 = !DILocation(line: 9, scope: !22) 82 !30 = !DILocation(line: 0, scope: !22) 83 !31 = !DILocation(line: 10, scope: !22) 84 !32 = !DILocation(line: 11, scope: !22) 85 86... 87--- 88name: test_sub_reg 89tracksRegLiveness: true 90callSites: 91 - { bb: 0, offset: 3 } 92 - { bb: 0, offset: 7, fwdArgRegs: 93 - { arg: 0, reg: '$rdi' } } 94body: | 95 bb.0.entry: 96 liveins: $rbx 97 98 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp, debug-location !29 99 CFI_INSTRUCTION def_cfa_offset 16 100 CFI_INSTRUCTION offset $rbx, -16 101 CALL64pcrel32 @value32, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !29 102 $ebx = MOV32rr $eax, debug-location !29 103 DBG_VALUE $ebx, $noreg, !28, !DIExpression(), debug-location !30 104 renamable $edi = MOV32rr $ebx, implicit-def $rdi, debug-location !31 105 CALL64pcrel32 @call64, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, debug-location !31 106 $eax = MOV32rr killed $ebx, debug-location !32 107 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !32 108 CFI_INSTRUCTION def_cfa_offset 8, debug-location !32 109 RETQ killed $eax, debug-location !32 110 111... 112 113# Verify that a call site value is emitted for the 64-bit parameter that is 114# loaded using the zero-extending MOV32rr. 115 116# CHECK: DW_TAG_GNU_call_site_parameter 117# CHECK-NEXT: DW_AT_location (DW_OP_reg5 RDI) 118# CHECK-NEXT: DW_AT_GNU_call_site_value (DW_OP_breg3 RBX+0) 119