live-debug-values-3preds.mir
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# RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s
# Test the extension of debug ranges from 3 predecessors.
# Generated from the source file LiveDebugValues-3preds.c:
# #include <stdio.h>
# int add(int x, int y, int z, int a) {
# int i;
# for (i = 0; i < x * y; i++) {
# if (i < x) {
# a = a * x;
# break;
# }
# if (i < y) {
# a = a * y;
# break;
# }
# if (i < z) {
# a = a * z;
# break;
# }
# }
# return a;
# }
# with clang -g -O1 -c -emit-llvm LiveDebugValues-3preds.c -S -o live-debug-values-3preds.ll
# then llc -stop-after stackmap-liveness live-debug-values-3preds.ll -o /dev/null > live-debug-values-3preds.mir
# CHECK: ![[X_VAR:[0-9]+]] = !DILocalVariable(name: "x", {{.*}})
# CHECK: ![[Y_VAR:[0-9]+]] = !DILocalVariable(name: "y", {{.*}})
# CHECK: ![[Z_VAR:[0-9]+]] = !DILocalVariable(name: "z", {{.*}})
# DBG_VALUE for variables "x", "y" and "z" are extended into %bb.9 from its
# predecessors %bb.0, %bb.2 and %bb.8.
# CHECK: bb.9.for.end:
# CHECK-DAG: DBG_VALUE $edi, $noreg, ![[X_VAR]], !DIExpression()
# CHECK-DAG: DBG_VALUE $esi, $noreg, ![[Y_VAR]], !DIExpression()
# CHECK-DAG: DBG_VALUE $edx, $noreg, ![[Z_VAR]], !DIExpression()
# CHECK: RET
--- |
; ModuleID = 'live-debug-values-3preds.ll'
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; Function Attrs: norecurse nounwind readnone uwtable
define i32 @add(i32 %x, i32 %y, i32 %z, i32 %a) #0 !dbg !4 {
entry:
tail call void @llvm.dbg.value(metadata i32 %x, i64 0, metadata !9, metadata !17), !dbg !18
tail call void @llvm.dbg.value(metadata i32 %y, i64 0, metadata !10, metadata !17), !dbg !19
tail call void @llvm.dbg.value(metadata i32 %z, i64 0, metadata !11, metadata !17), !dbg !21
tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !12, metadata !17), !dbg !23
tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !13, metadata !17), !dbg !25
%mul = mul nsw i32 %y, %x, !dbg !26
%cmp.24 = icmp sgt i32 %mul, 0, !dbg !30
br i1 %cmp.24, label %for.body.preheader, label %for.end, !dbg !31
for.body.preheader: ; preds = %entry
br label %for.body, !dbg !32
for.cond: ; preds = %if.end.6
%cmp = icmp slt i32 %inc, %mul, !dbg !30
br i1 %cmp, label %for.body, label %for.end, !dbg !31
for.body: ; preds = %for.cond, %for.body.preheader
%i.025 = phi i32 [ %inc, %for.cond ], [ 0, %for.body.preheader ]
%0 = icmp sgt i32 %x, 0
br i1 %0, label %if.then, label %if.end, !dbg !35
if.then: ; preds = %for.body
%mul2 = mul nsw i32 %a, %x, !dbg !36
tail call void @llvm.dbg.value(metadata i32 %mul2, i64 0, metadata !12, metadata !17), !dbg !23
br label %for.end, !dbg !38
if.end: ; preds = %for.body
%1 = icmp sgt i32 %y, 0
br i1 %1, label %if.then.4, label %if.end.6, !dbg !39
if.then.4: ; preds = %if.end
%mul5 = mul nsw i32 %a, %y, !dbg !40
tail call void @llvm.dbg.value(metadata i32 %mul5, i64 0, metadata !12, metadata !17), !dbg !23
br label %for.end, !dbg !43
if.end.6: ; preds = %if.end
%2 = icmp sgt i32 %z, 0
%inc = add nuw nsw i32 %i.025, 1, !dbg !44
tail call void @llvm.dbg.value(metadata i32 %inc, i64 0, metadata !13, metadata !17), !dbg !25
br i1 %2, label %if.then.8, label %for.cond, !dbg !45
if.then.8: ; preds = %if.end.6
%mul9 = mul nsw i32 %a, %z, !dbg !46
tail call void @llvm.dbg.value(metadata i32 %mul9, i64 0, metadata !12, metadata !17), !dbg !23
br label %for.end, !dbg !49
for.end: ; preds = %for.cond, %if.then.8, %if.then.4, %if.then, %entry
%a.addr.0 = phi i32 [ %mul2, %if.then ], [ %mul5, %if.then.4 ], [ %mul9, %if.then.8 ], [ %a, %entry ], [ %a, %for.cond ]
ret i32 %a.addr.0, !dbg !50
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
attributes #0 = { norecurse nounwind readnone uwtable }
attributes #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!14, !15}
!llvm.ident = !{!16}
!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)
!1 = !DIFile(filename: "LiveDebugValues-3preds.c", directory: "/home/vt/julia/test/tvvikram")
!2 = !{}
!4 = distinct !DISubprogram(name: "add", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)
!5 = !DISubroutineType(types: !6)
!6 = !{!7, !7, !7, !7, !7}
!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!8 = !{!9, !10, !11, !12, !13}
!9 = !DILocalVariable(name: "x", arg: 1, scope: !4, file: !1, line: 1, type: !7)
!10 = !DILocalVariable(name: "y", arg: 2, scope: !4, file: !1, line: 1, type: !7)
!11 = !DILocalVariable(name: "z", arg: 3, scope: !4, file: !1, line: 1, type: !7)
!12 = !DILocalVariable(name: "a", arg: 4, scope: !4, file: !1, line: 1, type: !7)
!13 = !DILocalVariable(name: "i", scope: !4, file: !1, line: 2, type: !7)
!14 = !{i32 2, !"Dwarf Version", i32 4}
!15 = !{i32 2, !"Debug Info Version", i32 3}
!16 = !{!"clang version 3.8.0 (trunk 253049) "}
!17 = !DIExpression()
!18 = !DILocation(line: 1, column: 13, scope: !4)
!19 = !DILocation(line: 1, column: 20, scope: !20)
!20 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 1)
!21 = !DILocation(line: 1, column: 27, scope: !22)
!22 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 2)
!23 = !DILocation(line: 1, column: 34, scope: !24)
!24 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 3)
!25 = !DILocation(line: 2, column: 7, scope: !20)
!26 = !DILocation(line: 3, column: 21, scope: !27)
!27 = !DILexicalBlockFile(scope: !28, file: !1, discriminator: 1)
!28 = distinct !DILexicalBlock(scope: !29, file: !1, line: 3, column: 3)
!29 = distinct !DILexicalBlock(scope: !4, file: !1, line: 3, column: 3)
!30 = !DILocation(line: 3, column: 17, scope: !27)
!31 = !DILocation(line: 3, column: 3, scope: !27)
!32 = !DILocation(line: 4, column: 11, scope: !33)
!33 = distinct !DILexicalBlock(scope: !34, file: !1, line: 4, column: 9)
!34 = distinct !DILexicalBlock(scope: !28, file: !1, line: 3, column: 31)
!35 = !DILocation(line: 4, column: 9, scope: !34)
!36 = !DILocation(line: 5, column: 13, scope: !37)
!37 = distinct !DILexicalBlock(scope: !33, file: !1, line: 4, column: 16)
!38 = !DILocation(line: 6, column: 7, scope: !37)
!39 = !DILocation(line: 8, column: 9, scope: !34)
!40 = !DILocation(line: 9, column: 13, scope: !41)
!41 = distinct !DILexicalBlock(scope: !42, file: !1, line: 8, column: 16)
!42 = distinct !DILexicalBlock(scope: !34, file: !1, line: 8, column: 9)
!43 = !DILocation(line: 10, column: 7, scope: !41)
!44 = !DILocation(line: 3, column: 27, scope: !28)
!45 = !DILocation(line: 12, column: 9, scope: !34)
!46 = !DILocation(line: 13, column: 13, scope: !47)
!47 = distinct !DILexicalBlock(scope: !48, file: !1, line: 12, column: 16)
!48 = distinct !DILexicalBlock(scope: !34, file: !1, line: 12, column: 9)
!49 = !DILocation(line: 14, column: 7, scope: !47)
!50 = !DILocation(line: 17, column: 3, scope: !4)
...
---
name: add
alignment: 16
exposesReturnsTwice: false
tracksRegLiveness: true
liveins:
- { reg: '$edi' }
- { reg: '$esi' }
- { reg: '$edx' }
- { reg: '$ecx' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 0
adjustsStack: false
hasCalls: false
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
body: |
bb.0.entry:
successors: %bb.1.for.body.preheader(20), %bb.9.for.end(12)
liveins: $ecx, $edi, $edx, $esi
DBG_VALUE $edi, _, !9, !17, debug-location !18
DBG_VALUE $esi, _, !10, !17, debug-location !19
DBG_VALUE $edx, _, !11, !17, debug-location !21
DBG_VALUE $ecx, _, !12, !17, debug-location !23
DBG_VALUE 0, 0, !13, !17, debug-location !25
$r8d = MOV32rr $esi, debug-location !26
$r8d = IMUL32rr killed $r8d, $edi, implicit-def dead $eflags, debug-location !26
TEST32rr $r8d, $r8d, implicit-def $eflags, debug-location !31
JCC_1 %bb.9.for.end, 14, implicit $eflags
bb.1.for.body.preheader:
successors: %bb.3.for.body(0)
liveins: $ecx, $edi, $edx, $esi, $r8d
DBG_VALUE $edi, _, !9, !17, debug-location !18
DBG_VALUE $esi, _, !10, !17, debug-location !19
DBG_VALUE $edx, _, !11, !17, debug-location !21
DBG_VALUE $ecx, _, !12, !17, debug-location !23
DBG_VALUE 0, 0, !13, !17, debug-location !25
$eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags
bb.3.for.body (align 4):
successors: %bb.4.if.then(4), %bb.5.if.end(124)
liveins: $eax, $ecx, $edi, $edx, $esi, $r8d
DBG_VALUE $edi, _, !9, !17, debug-location !18
DBG_VALUE $esi, _, !10, !17, debug-location !19
DBG_VALUE $edx, _, !11, !17, debug-location !21
DBG_VALUE $ecx, _, !12, !17, debug-location !23
DBG_VALUE 0, 0, !13, !17, debug-location !25
TEST32rr $edi, $edi, implicit-def $eflags, debug-location !35
JCC_1 %bb.4.if.then, 15, implicit $eflags
bb.5.if.end:
successors: %bb.6.if.then.4(4), %bb.7.if.end.6(124)
liveins: $eax, $ecx, $edi, $edx, $esi, $r8d
DBG_VALUE $edi, _, !9, !17, debug-location !18
DBG_VALUE $esi, _, !10, !17, debug-location !19
DBG_VALUE $edx, _, !11, !17, debug-location !21
DBG_VALUE $ecx, _, !12, !17, debug-location !23
DBG_VALUE 0, 0, !13, !17, debug-location !25
TEST32rr $esi, $esi, implicit-def $eflags, debug-location !39
JCC_1 %bb.6.if.then.4, 15, implicit $eflags
bb.7.if.end.6:
successors: %bb.8.if.then.8(4), %bb.2.for.cond(124)
liveins: $eax, $ecx, $edi, $edx, $esi, $r8d
DBG_VALUE $edi, _, !9, !17, debug-location !18
DBG_VALUE $esi, _, !10, !17, debug-location !19
DBG_VALUE $edx, _, !11, !17, debug-location !21
DBG_VALUE $ecx, _, !12, !17, debug-location !23
DBG_VALUE 0, 0, !13, !17, debug-location !25
TEST32rr $edx, $edx, implicit-def $eflags, debug-location !45
JCC_1 %bb.8.if.then.8, 15, implicit $eflags
bb.2.for.cond:
successors: %bb.3.for.body(124), %bb.9.for.end(4)
liveins: $eax, $ecx, $edi, $edx, $esi, $r8d
DBG_VALUE $edi, _, !9, !17, debug-location !18
DBG_VALUE $esi, _, !10, !17, debug-location !19
DBG_VALUE $edx, _, !11, !17, debug-location !21
DBG_VALUE $ecx, _, !12, !17, debug-location !23
DBG_VALUE 0, 0, !13, !17, debug-location !25
$eax = INC32r killed $eax, implicit-def dead $eflags, debug-location !44
DBG_VALUE $eax, _, !13, !17, debug-location !25
CMP32rr $eax, $r8d, implicit-def $eflags, debug-location !31
JCC_1 %bb.3.for.body, 12, implicit $eflags
JMP_1 %bb.9.for.end
bb.4.if.then:
liveins: $ecx, $edi
DBG_VALUE $edi, _, !9, !17, debug-location !18
DBG_VALUE $ecx, _, !12, !17, debug-location !23
DBG_VALUE 0, 0, !13, !17, debug-location !25
$ecx = IMUL32rr killed $ecx, killed $edi, implicit-def dead $eflags, debug-location !36
DBG_VALUE 0, 0, !13, !17, debug-location !25
$eax = MOV32rr killed $ecx, debug-location !50
RETQ $eax, debug-location !50
bb.6.if.then.4:
liveins: $ecx, $esi
DBG_VALUE $esi, _, !10, !17, debug-location !19
DBG_VALUE $ecx, _, !12, !17, debug-location !23
DBG_VALUE 0, 0, !13, !17, debug-location !25
$ecx = IMUL32rr killed $ecx, killed $esi, implicit-def dead $eflags, debug-location !40
DBG_VALUE 0, 0, !13, !17, debug-location !25
$eax = MOV32rr killed $ecx, debug-location !50
RETQ $eax, debug-location !50
bb.8.if.then.8:
successors: %bb.9.for.end(0)
liveins: $ecx, $edx
DBG_VALUE $edx, _, !11, !17, debug-location !21
DBG_VALUE $ecx, _, !12, !17, debug-location !23
DBG_VALUE 0, 0, !13, !17, debug-location !25
$ecx = IMUL32rr killed $ecx, killed $edx, implicit-def dead $eflags, debug-location !46
bb.9.for.end:
liveins: $ecx
DBG_VALUE 0, 0, !13, !17, debug-location !25
$eax = MOV32rr killed $ecx, debug-location !50
RETQ $eax, debug-location !50
...