| # RUN: llc -emit-call-site-info -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s |
| |
| ## Compiled from source: |
| ## __attribute__((noinline)) |
| ## int foo (int x, int y, int a) { |
| ## int i; |
| ## for (i = 0; i < x * y; i++) { |
| ## if (i < x) { |
| ## a = a * x; |
| ## break; |
| ## } |
| ## } |
| ## return a; |
| ## } |
| ## Using commands: |
| ## $ clang -g -O1 test.c -emit-llvm -S -o test.ll |
| ## $ llc -emit-call-site-info -stop-after stackmap-liveness test.ll -o test.mir |
| |
| ## Artificially added DBG_VALUE $esi, $noreg, !14, !DIExpression() into |
| ## for.cond Basic Block to prevent further usage of Entry Value in the loop. |
| |
| # CHECK: ![[ARG_Y:.*]] = !DILocalVariable(name: "y" |
| # CHECK: for.cond: |
| # CHECK: DBG_VALUE $esi, $noreg, ![[ARG_Y]], !DIExpression() |
| # CHECK-NOT: DBG_VALUE $esi, $noreg, ![[ARG_Y]], !DIExpression(DW_OP_LLVM_entry_value, 1) |
| --- | |
| ; ModuleID = 'test.ll' |
| 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" |
| |
| ; Function Attrs: nofree noinline norecurse nosync nounwind readnone uwtable |
| define dso_local i32 @foo(i32 %x, i32 %y, i32 %a) local_unnamed_addr !dbg !8 { |
| entry: |
| call void @llvm.dbg.value(metadata i32 %x, metadata !13, metadata !DIExpression()), !dbg !17 |
| call void @llvm.dbg.value(metadata i32 %y, metadata !14, metadata !DIExpression()), !dbg !17 |
| call void @llvm.dbg.value(metadata i32 %a, metadata !15, metadata !DIExpression()), !dbg !17 |
| call void @llvm.dbg.value(metadata i32 0, metadata !16, metadata !DIExpression()), !dbg !17 |
| %mul = mul nsw i32 %y, %x |
| call void @llvm.dbg.value(metadata i32 0, metadata !16, metadata !DIExpression()), !dbg !17 |
| %cmp9 = icmp sgt i32 %mul, 0, !dbg !18 |
| br i1 %cmp9, label %for.body.preheader, label %for.end, !dbg !21 |
| |
| for.body.preheader: ; preds = %entry |
| %0 = mul i32 %y, %x, !dbg !21 |
| br label %for.body, !dbg !21 |
| |
| for.cond: ; preds = %for.body |
| call void @llvm.dbg.value(metadata i32 undef, metadata !16, metadata !DIExpression()), !dbg !17 |
| %lsr.iv.next = add i32 %lsr.iv, -1, !dbg !18 |
| %exitcond.not = icmp eq i32 %lsr.iv.next, 0, !dbg !18 |
| br i1 %exitcond.not, label %for.end, label %for.body, !dbg !21, !llvm.loop !22 |
| |
| for.body: ; preds = %for.cond, %for.body.preheader |
| %lsr.iv = phi i32 [ %lsr.iv.next, %for.cond ], [ %0, %for.body.preheader ] |
| %1 = icmp sgt i32 %x, 0 |
| call void @llvm.dbg.value(metadata i32 undef, metadata !16, metadata !DIExpression()), !dbg !17 |
| call void @llvm.dbg.value(metadata i32 undef, metadata !16, metadata !DIExpression()), !dbg !17 |
| br i1 %1, label %if.then, label %for.cond, !dbg !26 |
| |
| if.then: ; preds = %for.body |
| %mul2 = mul nsw i32 %a, %x, !dbg !28 |
| call void @llvm.dbg.value(metadata i32 %mul2, metadata !15, metadata !DIExpression()), !dbg !17 |
| br label %for.end, !dbg !31 |
| |
| for.end: ; preds = %for.cond, %if.then, %entry |
| %a.addr.0 = phi i32 [ %mul2, %if.then ], [ %a, %entry ], [ %a, %for.cond ] |
| call void @llvm.dbg.value(metadata i32 %a.addr.0, metadata !15, metadata !DIExpression()), !dbg !17 |
| ret i32 %a.addr.0, !dbg !32 |
| } |
| |
| ; Function Attrs: nofree nosync nounwind readnone speculatable willreturn |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5, !6} |
| !llvm.ident = !{!7} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 13.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) |
| !1 = !DIFile(filename: "test.c", directory: "/dir") |
| !2 = !{} |
| !3 = !{i32 7, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !{i32 7, !"uwtable", i32 1} |
| !7 = !{!"clang version 13.0.0"} |
| !8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !9, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12) |
| !9 = !DISubroutineType(types: !10) |
| !10 = !{!11, !11, !11, !11} |
| !11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !12 = !{!13, !14, !15, !16} |
| !13 = !DILocalVariable(name: "x", arg: 1, scope: !8, file: !1, line: 2, type: !11) |
| !14 = !DILocalVariable(name: "y", arg: 2, scope: !8, file: !1, line: 2, type: !11) |
| !15 = !DILocalVariable(name: "a", arg: 3, scope: !8, file: !1, line: 2, type: !11) |
| !16 = !DILocalVariable(name: "i", scope: !8, file: !1, line: 3, type: !11) |
| !17 = !DILocation(line: 0, scope: !8) |
| !18 = !DILocation(line: 4, column: 17, scope: !19) |
| !19 = distinct !DILexicalBlock(scope: !20, file: !1, line: 4, column: 3) |
| !20 = distinct !DILexicalBlock(scope: !8, file: !1, line: 4, column: 3) |
| !21 = !DILocation(line: 4, column: 3, scope: !20) |
| !22 = distinct !{!22, !21, !23, !24, !25} |
| !23 = !DILocation(line: 9, column: 3, scope: !20) |
| !24 = !{!"llvm.loop.mustprogress"} |
| !25 = !{!"llvm.loop.unroll.disable"} |
| !26 = !DILocation(line: 5, column: 9, scope: !27) |
| !27 = distinct !DILexicalBlock(scope: !19, file: !1, line: 4, column: 31) |
| !28 = !DILocation(line: 6, column: 13, scope: !29) |
| !29 = distinct !DILexicalBlock(scope: !30, file: !1, line: 5, column: 16) |
| !30 = distinct !DILexicalBlock(scope: !27, file: !1, line: 5, column: 9) |
| !31 = !DILocation(line: 7, column: 7, scope: !29) |
| !32 = !DILocation(line: 10, column: 3, scope: !8) |
| |
| ... |
| --- |
| name: foo |
| alignment: 16 |
| liveins: |
| - { reg: '$edi', virtual-reg: '' } |
| - { reg: '$esi', virtual-reg: '' } |
| - { reg: '$edx', virtual-reg: '' } |
| body: | |
| bb.0.entry: |
| successors: %bb.2(0x50000000), %bb.4(0x30000000) |
| liveins: $edi, $edx, $esi |
| |
| DBG_VALUE $edi, $noreg, !13, !DIExpression(), debug-location !17 |
| DBG_VALUE $esi, $noreg, !14, !DIExpression(), debug-location !17 |
| DBG_VALUE $edx, $noreg, !15, !DIExpression(), debug-location !17 |
| $eax = MOV32rr $edx |
| DBG_VALUE 0, $noreg, !16, !DIExpression(), debug-location !17 |
| DBG_VALUE $eax, $noreg, !15, !DIExpression(), debug-location !17 |
| renamable $esi = nsw IMUL32rr killed renamable $esi, renamable $edi, implicit-def dead $eflags |
| TEST32rr renamable $esi, renamable $esi, implicit-def $eflags, debug-location !18 |
| JCC_1 %bb.4, 14, implicit $eflags, debug-location !21 |
| |
| bb.2.for.body (align 16): |
| successors: %bb.3(0x04000000), %bb.1(0x7c000000) |
| liveins: $eax, $edi, $esi |
| |
| TEST32rr renamable $edi, renamable $edi, implicit-def $eflags |
| DBG_VALUE $noreg, $noreg, !16, !DIExpression(), debug-location !17 |
| JCC_1 %bb.3, 15, implicit $eflags, debug-location !26 |
| |
| bb.1.for.cond: |
| successors: %bb.4(0x04000000), %bb.2(0x7c000000) |
| liveins: $eax, $edi, $esi |
| |
| DBG_VALUE $esi, $noreg, !14, !DIExpression(), debug-location !17 |
| DBG_VALUE $noreg, $noreg, !16, !DIExpression(), debug-location !17 |
| renamable $esi = ADD32ri8 killed renamable $esi, -1, implicit-def $eflags, debug-location !18 |
| JCC_1 %bb.2, 5, implicit $eflags, debug-location !21 |
| |
| bb.4.for.end: |
| liveins: $eax |
| |
| DBG_VALUE $eax, $noreg, !15, !DIExpression(), debug-location !17 |
| RET64 $eax, debug-location !32 |
| |
| bb.3.if.then: |
| liveins: $eax, $edi |
| |
| renamable $eax = nsw IMUL32rr killed renamable $eax, killed renamable $edi, implicit-def dead $eflags, debug-location !28 |
| DBG_VALUE $eax, $noreg, !15, !DIExpression(), debug-location !17 |
| DBG_VALUE $eax, $noreg, !15, !DIExpression(), debug-location !17 |
| RET64 $eax, debug-location !32 |
| |
| ... |
