# RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s
# Test the extension of debug ranges from predecessors.
# Generated from the source file LiveDebugValues.c:
# #include <stdio.h>
# int m;
# extern int inc(int n);
# extern int change(int n);
# extern int modify(int n);
# int main(int argc, char **argv) {
# int n;
# if (argc != 2)
# n = 2;
# else
# n = atoi(argv[1]);
# n = change(n);
# if (n > 10) {
# m = modify(n);
# m = m + n; // var `m' doesn't has a dbg.value
# }
# else
# m = inc(n); // var `m' doesn't has a dbg.value
# printf("m(main): %d\n", m);
# return 0;
# }
# with clang -g -O3 -c -emit-llvm LiveDebugValues.c -S -o live-debug-values.ll
# then llc -stop-after stackmap-liveness live-debug-values.ll -o /dev/null > live-debug-values.mir
# This case will also produce multiple locations but only the debug range
# extension is tested here. This test case is tested with DWARF information under
# llvm/test/DebugInfo/live-debug-values.ll and present here for testing under
# MIR->MIR serialization.
# DBG_VALUE for variable "n" is extended into %bb.5 from its predecessors %bb.3
# and %bb.4.
# CHECK: ![[N_VAR:[0-9]+]] = !DILocalVariable(name: "n",{{.*}})
#
# CHECK: bb.5.if.end.7:
# CHECK: DBG_VALUE $ebx, $noreg, ![[N_VAR]], !DIExpression()
--- |
; ModuleID = 'live-debug-values.ll'
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@m = common global i32 0, align 4, !dbg !16
@.str = private unnamed_addr constant [13 x i8] c"m(main): %d\0A\00", align 1
; Function Attrs: nounwind uwtable
define i32 @main(i32 %argc, i8** nocapture readonly %argv) #0 !dbg !4 {
entry:
tail call void @llvm.dbg.value(metadata i32 %argc, i64 0, metadata !12, metadata !20), !dbg !21
tail call void @llvm.dbg.value(metadata i8** %argv, i64 0, metadata !13, metadata !20), !dbg !22
%cmp = icmp eq i32 %argc, 2, !dbg !24
br i1 %cmp, label %if.else, label %if.end, !dbg !26
if.else: ; preds = %entry
%arrayidx = getelementptr inbounds i8*, i8** %argv, i64 1, !dbg !27
%0 = load i8*, i8** %arrayidx, align 8, !dbg !27, !tbaa !28
%call = tail call i32 (i8*, ...) bitcast (i32 (...)* @atoi to i32 (i8*, ...)*)(i8* %0) #4, !dbg !32
tail call void @llvm.dbg.value(metadata i32 %call, i64 0, metadata !14, metadata !20), !dbg !33
br label %if.end
if.end: ; preds = %if.else, %entry
%n.0 = phi i32 [ %call, %if.else ], [ 2, %entry ]
%call1 = tail call i32 @change(i32 %n.0) #4, !dbg !34
tail call void @llvm.dbg.value(metadata i32 %call1, i64 0, metadata !14, metadata !20), !dbg !33
%cmp2 = icmp sgt i32 %call1, 10, !dbg !35
br i1 %cmp2, label %if.then.3, label %if.else.5, !dbg !37
if.then.3: ; preds = %if.end
%call4 = tail call i32 @modify(i32 %call1) #4, !dbg !38
%add = add nsw i32 %call4, %call1, !dbg !40
br label %if.end.7, !dbg !41
if.else.5: ; preds = %if.end
%call6 = tail call i32 @inc(i32 %call1) #4, !dbg !42
br label %if.end.7
if.end.7: ; preds = %if.else.5, %if.then.3
%storemerge = phi i32 [ %call6, %if.else.5 ], [ %add, %if.then.3 ]
store i32 %storemerge, i32* @m, align 4, !dbg !43, !tbaa !44
%call8 = tail call i32 (i8*, ...) @printf(i8* nonnull getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), i32 %storemerge) #4, !dbg !46
ret i32 0, !dbg !47
}
declare i32 @atoi(...) #1
declare i32 @change(i32) #1
declare i32 @modify(i32) #1
declare i32 @inc(i32) #1
; Function Attrs: nounwind
declare i32 @printf(i8* nocapture readonly, ...) #2
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
attributes #0 = { nounwind uwtable }
attributes #1 = { nounwind }
attributes #2 = { nounwind }
attributes #3 = { nounwind readnone }
attributes #4 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!17, !18}
!llvm.ident = !{!19}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 253049) ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !15)
!1 = !DIFile(filename: "LiveDebugValues.c", directory: "/home/vt/julia/test/tvvikram")
!2 = !{}
!4 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 6, type: !5, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
!5 = !DISubroutineType(types: !6)
!6 = !{!7, !7, !8}
!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64, align: 64)
!9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, align: 64)
!10 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
!11 = !{!12, !13, !14}
!12 = !DILocalVariable(name: "argc", arg: 1, scope: !4, file: !1, line: 6, type: !7)
!13 = !DILocalVariable(name: "argv", arg: 2, scope: !4, file: !1, line: 6, type: !8)
!14 = !DILocalVariable(name: "n", scope: !4, file: !1, line: 7, type: !7)
!15 = !{!16}
!16 = !DIGlobalVariableExpression(var: !DIGlobalVariable(name: "m", scope: !0, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true), expr: !DIExpression())
!17 = !{i32 2, !"Dwarf Version", i32 4}
!18 = !{i32 2, !"Debug Info Version", i32 3}
!19 = !{!"clang version 3.8.0 (trunk 253049)"}
!20 = !DIExpression()
!21 = !DILocation(line: 6, column: 14, scope: !4)
!22 = !DILocation(line: 6, column: 27, scope: !23)
!23 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 1)
!24 = !DILocation(line: 8, column: 12, scope: !25)
!25 = distinct !DILexicalBlock(scope: !4, file: !1, line: 8, column: 7)
!26 = !DILocation(line: 8, column: 7, scope: !4)
!27 = !DILocation(line: 11, column: 14, scope: !25)
!28 = !{!29, !29, i64 0}
!29 = !{!"any pointer", !30, i64 0}
!30 = !{!"omnipotent char", !31, i64 0}
!31 = !{!"Simple C/C++ TBAA"}
!32 = !DILocation(line: 11, column: 9, scope: !25)
!33 = !DILocation(line: 7, column: 7, scope: !23)
!34 = !DILocation(line: 12, column: 7, scope: !4)
!35 = !DILocation(line: 13, column: 9, scope: !36)
!36 = distinct !DILexicalBlock(scope: !4, file: !1, line: 13, column: 7)
!37 = !DILocation(line: 13, column: 7, scope: !4)
!38 = !DILocation(line: 14, column: 9, scope: !39)
!39 = distinct !DILexicalBlock(scope: !36, file: !1, line: 13, column: 15)
!40 = !DILocation(line: 15, column: 11, scope: !39)
!41 = !DILocation(line: 16, column: 3, scope: !39)
!42 = !DILocation(line: 18, column: 9, scope: !36)
!43 = !DILocation(line: 15, column: 7, scope: !39)
!44 = !{!45, !45, i64 0}
!45 = !{!"int", !30, i64 0}
!46 = !DILocation(line: 19, column: 3, scope: !4)
!47 = !DILocation(line: 20, column: 3, scope: !4)
...
---
name: main
alignment: 16
exposesReturnsTwice: false
tracksRegLiveness: true
liveins:
- { reg: '$edi' }
- { reg: '$rsi' }
calleeSavedRegisters: [ '$bh', '$bl', '$bp', '$bpl', '$bx', '$ebp', '$ebx',
'$rbp', '$rbx', '$r12', '$r13', '$r14', '$r15',
'$r12b', '$r13b', '$r14b', '$r15b', '$r12d', '$r13d',
'$r14d', '$r15d', '$r12w', '$r13w', '$r14w', '$r15w' ]
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 8
offsetAdjustment: 0
maxAlignment: 0
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
fixedStack:
- { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$rbx' }
body: |
bb.0.entry:
successors: %bb.1.if.else(16), %bb.2.if.end(16)
liveins: $edi, $rsi, $rbx
frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
CFI_INSTRUCTION offset $rbx, -16
DBG_VALUE $edi, _, !12, !20, debug-location !21
DBG_VALUE $rsi, _, !13, !20, debug-location !22
$eax = MOV32rr $edi
DBG_VALUE $eax, _, !12, !20, debug-location !21
$edi = MOV32ri 2
CMP32ri8 killed $eax, 2, implicit-def $eflags, debug-location !26
JCC_1 %bb.2.if.end, 5, implicit $eflags
bb.1.if.else:
successors: %bb.2.if.end(0)
liveins: $rsi
DBG_VALUE $rsi, _, !13, !20, debug-location !22
$rdi = MOV64rm killed $rsi, 1, _, 8, _, debug-location !27 :: (load (s64) from %ir.arrayidx, !tbaa !28)
dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !32
CALL64pcrel32 @atoi, csr_64, implicit $rsp, implicit $rdi, implicit $al, implicit-def $rsp, implicit-def $eax, debug-location !32
$edi = MOV32rr $eax, debug-location !32
DBG_VALUE $edi, _, !14, !20, debug-location !33
bb.2.if.end:
successors: %bb.3.if.then.3(16), %bb.4.if.else.5(16)
liveins: $edi
CALL64pcrel32 @change, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !34
$ebx = MOV32rr $eax, debug-location !34
DBG_VALUE $ebx, _, !14, !20, debug-location !33
CMP32ri8 $ebx, 11, implicit-def $eflags, debug-location !37
JCC_1 %bb.4.if.else.5, 12, implicit killed $eflags, debug-location !37
bb.3.if.then.3:
successors: %bb.5.if.end.7(0)
liveins: $ebx
DBG_VALUE $ebx, _, !14, !20, debug-location !33
$edi = MOV32rr $ebx, debug-location !38
CALL64pcrel32 @modify, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !38
$ecx = MOV32rr $eax, debug-location !38
$ecx = ADD32rr killed $ecx, killed $ebx, implicit-def dead $eflags, debug-location !40
JMP_1 %bb.5.if.end.7
bb.4.if.else.5:
successors: %bb.5.if.end.7(0)
liveins: $ebx
DBG_VALUE $ebx, _, !14, !20, debug-location !33
$edi = MOV32rr killed $ebx, debug-location !42
CALL64pcrel32 @inc, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !42
$ecx = MOV32rr $eax, debug-location !42
bb.5.if.end.7:
liveins: $ecx
MOV32mr $rip, 1, _, @m, _, $ecx, debug-location !43 :: (store (s32) into @m, !tbaa !44)
dead $edi = MOV32ri @.str, implicit-def $rdi, debug-location !46
dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !47
$esi = MOV32rr killed $ecx, debug-location !46
CALL64pcrel32 @printf, csr_64, implicit $rsp, implicit $rdi, implicit $esi, implicit $al, implicit-def $rsp, implicit-def dead $eax, debug-location !46
$eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, debug-location !47
$rbx = POP64r implicit-def $rsp, implicit $rsp, debug-location !47
RET64 $eax, debug-location !47
...