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1# RUN: llc -emit-call-site-info -start-before=livedebugvalues -filetype=obj -o - %s \2# RUN: | llvm-dwarfdump - | FileCheck %s --implicit-check-not=DW_TAG_GNU_call_site_parameter3 4--- |5 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"6 target triple = "x86_64-unknown-linux-gnu"7 8 ; Function Attrs: nounwind uwtable9 define void @foo() #0 !dbg !12 {10 entry:11 call void @call(i32 123, i32 undef), !dbg !1512 ret void, !dbg !1613 }14 15 declare !dbg !4 void @call(i32, i32)16 17 attributes #0 = { nounwind uwtable }18 19 !llvm.dbg.cu = !{!0}20 !llvm.module.flags = !{!8, !9, !10}21 !llvm.ident = !{!11}22 23 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, splitDebugInlining: false, nameTableKind: None)24 !1 = !DIFile(filename: "clobber.c", directory: "/")25 !2 = !{}26 !3 = !{!4}27 !4 = !DISubprogram(name: "call", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)28 !5 = !DISubroutineType(types: !6)29 !6 = !{null, !7, !7}30 !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)31 !8 = !{i32 7, !"Dwarf Version", i32 4}32 !9 = !{i32 2, !"Debug Info Version", i32 3}33 !10 = !{i32 1, !"wchar_size", i32 4}34 !11 = !{!"clang version 11.0.0"}35 !12 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !13, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)36 !13 = !DISubroutineType(types: !14)37 !14 = !{null}38 !15 = !DILocation(line: 5, scope: !12)39 !16 = !DILocation(line: 6, scope: !12)40 41...42---43name: foo44callSites:45 - { bb: 0, offset: 4, fwdArgRegs:46 - { arg: 0, reg: '$edi' }47 - { arg: 1, reg: '$esi' } }48body: |49 bb.0.entry:50 frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp51 CFI_INSTRUCTION def_cfa_offset 1652 $esi = MOV32ri 123, debug-location !1553 $edi = MOV32rr $esi, implicit-def $esi, debug-location !1554 CALL64pcrel32 @call, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit undef $esi, implicit-def $rsp, implicit-def $ssp, debug-location !1555 $rax = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !1656 CFI_INSTRUCTION def_cfa_offset 8, debug-location !1657 RET64 debug-location !1658 59...60 61# In this test an implicit-def has been added to the MOV32rr instruction to62# simulate a situation where one instruction defines two call site worklist63# registers, and where we end up with one of the registers being described by64# the previous value of the other register that is clobbered by this65# instruction.66#67# In this reproducer we should end up with only one call site entry, with that68# being for $rdi.69#70# This test uses an implicit CHECK-NOT to verify that only one call site71# parameter entry is emitted.72#73# A somewhat more realistic scenario would for example be the following in a74# made-up ISA:75#76# $r1 = mv 12377# $r0, $r1 = mvri $r1, <undescribable value>78# call @foo, $r0, $r179 80# CHECK: DW_TAG_GNU_call_site_parameter81# CHECK-NEXT: DW_AT_location (DW_OP_reg5 RDI)82# CHECK-NEXT: DW_AT_GNU_call_site_value (DW_OP_constu 0x7b)83