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| # RUN: llc -start-before=prologepilog -stop-after=livedebugvalues %s -o - | FileCheck %s
#
# This test tests tracking variables value transferring from one register to another.
# This example is altered additionally in order to test transferring from one float register
# to another. The altered instructions are labeled below.
#
# CHECK: ![[ARG1:.*]] = !DILocalVariable(name: "arg1"
# CHECK: DBG_VALUE $ebx, $noreg, ![[ARG1]], !DIExpression(), debug-location
# CHECK: $r12d = MOV32rr killed $ebx, implicit-def $r12
# CHECK-NEXT: DBG_VALUE $r12d, $noreg, ![[ARG1]], !DIExpression(), debug-location
--- |
; ModuleID = 'live-debug-values-reg-copy.ll'
source_filename = "live-debug-values-reg-copy.c"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define dso_local i32 @foo(i32 %arg1) local_unnamed_addr !dbg !7 {
entry:
%local1 = alloca i32, align 4
call void @llvm.dbg.value(metadata i32 %arg1, metadata !12, metadata !DIExpression()), !dbg !15
%0 = bitcast i32* %local1 to i8*, !dbg !15
call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0), !dbg !15
call void @init(i32* nonnull %local1), !dbg !15
%1 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
%add = add nsw i32 %1, %arg1, !dbg !15
%call = call i32 @coeficient(i32 %add), !dbg !15
%cmp = icmp sgt i32 %call, 32, !dbg !15
br i1 %cmp, label %if.then, label %if.else, !dbg !15
if.then: ; preds = %entry
%call1 = call i32 @externFunc(i32 %arg1), !dbg !15
%2 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
%add2 = add nsw i32 %2, %call1, !dbg !15
br label %if.end, !dbg !15
if.else: ; preds = %entry
%call3 = call i32 @externFunc2(i32 %arg1), !dbg !15
%3 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
%add4 = add nsw i32 %3, %call3, !dbg !15
br label %if.end
if.end: ; preds = %if.else, %if.then
%storemerge = phi i32 [ %add4, %if.else ], [ %add2, %if.then ]
%4 = bitcast i32* %local1 to i8*
%mul = shl nsw i32 %arg1, 2, !dbg !15
%add5 = add nsw i32 %storemerge, %mul, !dbg !15
%mul6 = mul nsw i32 %add5, %call, !dbg !15
call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %4), !dbg !15
ret i32 %mul6, !dbg !15
}
; Function Attrs: argmemonly nounwind
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #0
declare dso_local void @init(i32*) local_unnamed_addr
declare dso_local i32 @coeficient(i32) local_unnamed_addr
declare dso_local i32 @externFunc(i32) local_unnamed_addr
declare dso_local i32 @externFunc2(i32) local_unnamed_addr
; Function Attrs: argmemonly nounwind
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #0
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.value(metadata, metadata, metadata) #1
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**) #2
attributes #0 = { argmemonly nounwind }
attributes #1 = { nounwind readnone speculatable }
attributes #2 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "live-debug-values-reg-copy.c", directory: "/")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{!"clang version 7.0.0 "}
!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 6, type: !8, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
!8 = !DISubroutineType(types: !9)
!9 = !{!10, !10}
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !{!12}
!12 = !DILocalVariable(name: "arg1", arg: 1, scope: !7, file: !1, line: 6, type: !10)
!15 = !DILocation(line: 6, column: 13, scope: !7)
!20 = !{!21, !21, i64 0}
!21 = !{!"int", !22, i64 0}
!22 = !{!"omnipotent char", !23, i64 0}
!23 = !{!"Simple C/C++ TBAA"}
...
---
name: foo
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
tracksRegLiveness: true
registers:
liveins:
- { reg: '$edi', virtual-reg: '' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 24
offsetAdjustment: 0
maxAlignment: 4
adjustsStack: true
hasCalls: true
stackProtector: ''
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
savePoint: ''
restorePoint: ''
fixedStack:
- { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default,
callee-saved-register: '$rbx', callee-saved-restored: true }
- { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default,
callee-saved-register: '$rbp', callee-saved-restored: true }
stack:
- { id: 0, name: local1, type: default, offset: -28, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
constants:
body: |
bb.0.entry:
successors: %bb.1(0x40000000), %bb.2(0x40000000)
liveins: $edi, $rbp, $rbx
frame-setup PUSH64r killed $rbp, 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 $rbp, -16
DBG_VALUE $edi, $noreg, !12, !DIExpression(), debug-location !15
$ebx = MOV32rr $edi, implicit-def $rbx
DBG_VALUE $ebx, $noreg, !12, !DIExpression(), debug-location !15
renamable $rdi = LEA64r $rsp, 1, $noreg, 4, $noreg
CALL64pcrel32 @init, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, debug-location !15
renamable $edi = MOV32rm $rsp, 1, $noreg, 4, $noreg :: (dereferenceable load 4 from %ir.local1, !tbaa !20)
renamable $edi = ADD32rr killed renamable $edi, renamable $ebx, implicit-def dead $eflags, debug-location !15
CALL64pcrel32 @coeficient, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
$ebp = MOV32rr $eax, debug-location !15
$edi = MOV32rr $ebx, debug-location !15
CMP32ri8 renamable $ebp, 33, implicit-def $eflags, debug-location !15
JCC_1 %bb.2, 12, implicit killed $eflags, debug-location !15
bb.1.if.then:
successors: %bb.3(0x80000000)
liveins: $ebp, $edi
CALL64pcrel32 @externFunc, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
JMP_1 %bb.3
bb.2.if.else:
successors: %bb.3(0x80000000)
liveins: $ebp, $edi
CALL64pcrel32 @externFunc2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
bb.3.if.end:
liveins: $ebp, $ebx, $eax
; Instruction below is added in order to test moving variable's value from one register to another.
$r12d = MOV32rr killed $ebx, implicit-def $r12
renamable $eax = KILL $eax, implicit-def $rax
renamable $eax = ADD32rm renamable $eax, $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, implicit killed $rax, implicit-def $rax :: (dereferenceable load 4 from %ir.local1, !tbaa !20)
renamable $eax = LEA64_32r killed renamable $rax, 4, killed renamable $r12, 0, $noreg, debug-location !15
renamable $eax = IMUL32rr killed renamable $eax, killed renamable $ebp, implicit-def dead $eflags, debug-location !15
$rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !15
$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15
$rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15
RETQ $eax, debug-location !15
...
|