# RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \
# RUN: -experimental-debug-variable-locations -run-pass=livedebugvalues\
# RUN: | FileCheck %s
#
# Test that a DBG_INSTR_REF that refers to a DBG_PHI, will be translated into a
# DBG_VALUE of the value read at that DBG_PHI. Same original code as
# phi-coalescing.mir.
#
--- |
; ModuleID = 'phi-coalescing.mir'
source_filename = "test.c"
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"
define dso_local i32 @foo(i64 %bar, i64 %baz) !dbg !7 {
entry:
call void @llvm.dbg.value(metadata i64 %bar, metadata !12, metadata !DIExpression()), !dbg !13
call void @llvm.dbg.value(metadata i64 %baz, metadata !14, metadata !DIExpression()), !dbg !13
call void @ext(i64 %bar), !dbg !15
%add = add nsw i64 %bar, 12, !dbg !16
call void @llvm.dbg.value(metadata i64 %add, metadata !12, metadata !DIExpression()), !dbg !13
call void @ext(i64 %add), !dbg !17
%call = call i64 @getlong(), !dbg !18
%tobool = icmp ne i64 %call, 0, !dbg !18
br i1 %tobool, label %if.then, label %if.end, !dbg !20
if.then: ; preds = %entry
%add1 = add nsw i64 %add, 1, !dbg !21
call void @llvm.dbg.value(metadata i64 %add1, metadata !12, metadata !DIExpression()), !dbg !13
br label %if.end, !dbg !22
if.end: ; preds = %if.then, %entry
%bar.addr.0 = phi i64 [ %add1, %if.then ], [ %add, %entry ], !dbg !13
call void @llvm.dbg.value(metadata i64 %bar.addr.0, metadata !12, metadata !DIExpression()), !dbg !13
%add2 = add nsw i64 %bar.addr.0, %baz, !dbg !23
call void @llvm.dbg.value(metadata i64 %add2, metadata !12, metadata !DIExpression()), !dbg !13
call void @ext(i64 %add2), !dbg !24
%conv = trunc i64 %add2 to i32, !dbg !25
ret i32 %conv, !dbg !26
}
; Function Attrs: nounwind readnone speculatable willreturn
declare void @llvm.dbg.declare(metadata, metadata, metadata)
declare dso_local void @ext(i64)
declare dso_local i64 @getlong()
; Function Attrs: nounwind readnone speculatable willreturn
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "test.c", directory: "/tmp/out.c")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{!""}
!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!8 = !DISubroutineType(types: !9)
!9 = !{!10, !11, !11}
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
!12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11)
!13 = !DILocation(line: 0, scope: !7)
!14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11)
!15 = !DILocation(line: 4, column: 3, scope: !7)
!16 = !DILocation(line: 5, column: 7, scope: !7)
!17 = !DILocation(line: 6, column: 3, scope: !7)
!18 = !DILocation(line: 8, column: 7, scope: !19)
!19 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7)
!20 = !DILocation(line: 8, column: 7, scope: !7)
!21 = !DILocation(line: 9, column: 9, scope: !19)
!22 = !DILocation(line: 9, column: 5, scope: !19)
!23 = !DILocation(line: 11, column: 7, scope: !7)
!24 = !DILocation(line: 12, column: 3, scope: !7)
!25 = !DILocation(line: 13, column: 10, scope: !7)
!26 = !DILocation(line: 13, column: 3, scope: !7)
...
---
name: foo
alignment: 16
tracksRegLiveness: true
debugInstrRef: true
liveins:
- { reg: '$rdi' }
- { reg: '$rsi' }
frameInfo:
stackSize: 24
offsetAdjustment: -24
maxAlignment: 1
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 16
fixedStack:
- { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '$rbx' }
- { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$r14' }
machineFunctionInfo: {}
body: |
bb.0.entry:
liveins: $rdi, $rsi, $r14, $rbx
frame-setup PUSH64r killed $r14, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 24
frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 32
CFI_INSTRUCTION offset $rbx, -24
CFI_INSTRUCTION offset $r14, -16
$r14 = MOV64rr $rsi
$rbx = MOV64rr $rdi
CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !15
renamable $rbx = ADD64ri32 killed renamable $rbx, 12, implicit-def $eflags, debug-location !16
$rdi = MOV64rr $rbx, debug-location !17
CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !17
CALL64pcrel32 @getlong, csr_64, implicit $rsp, implicit $ssp, implicit-def $rax, debug-location !18
CMP64ri8 killed renamable $rax, 0, implicit-def $eflags, debug-location !18
JCC_1 %bb.2, 4, implicit $eflags, debug-location !20
bb.1.if.then:
liveins: $rbx, $r14
renamable $rbx = ADD64ri32 killed renamable $rbx, 1, implicit-def $eflags, debug-location !21
bb.2.if.end:
liveins: $rbx, $r14
DBG_PHI $rbx, 1
$rax = COPY $rbx
$rbx = MOV64ri 0
DBG_INSTR_REF !12, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !13
; This sequence should mark the contents of rbx on block entry as being the
; value for the variable at this DBG_INSTR_REF. We've force it to be in
; $rax now, so we should see a DBG_VALUE for rax:
; CHECK: DBG_PHI $rbx, 1
; CHECK-NEXT: $rax = COPY $rbx
; CHECK-NEXT: $rbx = MOV64ri 0
; CHECK-NEXT: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0)
; CHECK-NEXT: DBG_VALUE_LIST {{.+}} $rax
$rbx = COPY $rax
renamable $rbx = ADD64rr killed renamable $rbx, killed renamable $r14, implicit-def $eflags, debug-location !23
DBG_VALUE $rbx, $noreg, !12, !DIExpression(), debug-location !13
$rdi = MOV64rr $rbx, debug-location !24
CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !24
$eax = MOV32rr $ebx, implicit killed $rbx, debug-location !26
$rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !26
CFI_INSTRUCTION def_cfa_offset 24, debug-location !26
$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !26
CFI_INSTRUCTION def_cfa_offset 16, debug-location !26
$r14 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !26
CFI_INSTRUCTION def_cfa_offset 8, debug-location !26
RET64 implicit $eax, debug-location !26
...
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