| # RUN: llc -emit-call-site-info -start-before=livedebugvalues -filetype=obj -o - %s \ |
| # RUN: | llvm-dwarfdump - | FileCheck %s --implicit-check-not=DW_TAG_GNU_call_site_parameter |
| |
| --- | |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; Function Attrs: nounwind uwtable |
| define void @foo() #0 !dbg !12 { |
| entry: |
| call void @call(i32 123, i32 undef), !dbg !15 |
| ret void, !dbg !16 |
| } |
| |
| declare !dbg !4 void @call(i32, i32) |
| |
| attributes #0 = { nounwind uwtable } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!8, !9, !10} |
| !llvm.ident = !{!11} |
| |
| !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) |
| !1 = !DIFile(filename: "clobber.c", directory: "/") |
| !2 = !{} |
| !3 = !{!4} |
| !4 = !DISubprogram(name: "call", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) |
| !5 = !DISubroutineType(types: !6) |
| !6 = !{null, !7, !7} |
| !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !8 = !{i32 7, !"Dwarf Version", i32 4} |
| !9 = !{i32 2, !"Debug Info Version", i32 3} |
| !10 = !{i32 1, !"wchar_size", i32 4} |
| !11 = !{!"clang version 11.0.0"} |
| !12 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !13, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2) |
| !13 = !DISubroutineType(types: !14) |
| !14 = !{null} |
| !15 = !DILocation(line: 5, scope: !12) |
| !16 = !DILocation(line: 6, scope: !12) |
| |
| ... |
| --- |
| name: foo |
| callSites: |
| - { bb: 0, offset: 4, fwdArgRegs: |
| - { arg: 0, reg: '$edi' } |
| - { arg: 1, reg: '$esi' } } |
| body: | |
| bb.0.entry: |
| frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp |
| CFI_INSTRUCTION def_cfa_offset 16 |
| $esi = MOV32ri 123, debug-location !15 |
| $edi = MOV32rr $esi, implicit-def $esi, debug-location !15 |
| CALL64pcrel32 @call, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit undef $esi, implicit-def $rsp, implicit-def $ssp, debug-location !15 |
| $rax = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !16 |
| CFI_INSTRUCTION def_cfa_offset 8, debug-location !16 |
| RETQ debug-location !16 |
| |
| ... |
| |
| # In this test an implicit-def has been added to the MOV32rr instruction to |
| # simulate a situation where one instruction defines two call site worklist |
| # registers, and where we end up with one of the registers being described by |
| # the previous value of the other register that is clobbered by this |
| # instruction. |
| # |
| # In this reproducer we should end up with only one call site entry, with that |
| # being for $rdi. |
| # |
| # This test uses an implicit CHECK-NOT to verify that only one call site |
| # parameter entry is emitted. |
| # |
| # A somewhat more realistic scenario would for example be the following in a |
| # made-up ISA: |
| # |
| # $r1 = mv 123 |
| # $r0, $r1 = mvri $r1, <undescribable value> |
| # call @foo, $r0, $r1 |
| |
| # CHECK: DW_TAG_GNU_call_site_parameter |
| # CHECK-NEXT: DW_AT_location (DW_OP_reg5 RDI) |
| # CHECK-NEXT: DW_AT_GNU_call_site_value (DW_OP_constu 0x7b) |