179 lines
8.4 KiB
LLVM
179 lines
8.4 KiB
LLVM
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; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s | FileCheck %s
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; This test case was generated from the following debug.c program,
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; using: clang debug.c -g -O1 -S -o dbg_value_phi_isel1.ll -emit-llvm
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; --------------------------------------
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; int end = 10;
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;
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; int main() {
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; int x = 9;
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; int y = 13;
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; for (int u = 0; u < end; ++u) {
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; x += y;
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; y = y * 3;
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; }
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;
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; volatile int arr[80];
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; for (int q = 0; q < 64; ++q) {
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; arr[q] = q + 3;
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; }
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;
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; return x;
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; }
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; --------------------------------------
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;
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; ModuleID = 'debug.c'
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source_filename = "debug.c"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@end = dso_local local_unnamed_addr global i32 10, align 4, !dbg !0
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; Function Attrs: nounwind uwtable
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define dso_local i32 @main() local_unnamed_addr #0 !dbg !11 {
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; CHECK-LABEL: name: main
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entry:
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%arr = alloca [80 x i32], align 16
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call void @llvm.dbg.value(metadata i32 9, metadata !15, metadata !DIExpression()), !dbg !26
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call void @llvm.dbg.value(metadata i32 13, metadata !16, metadata !DIExpression()), !dbg !27
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call void @llvm.dbg.value(metadata i32 0, metadata !17, metadata !DIExpression()), !dbg !28
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%0 = load i32, i32* @end, align 4, !dbg !29, !tbaa !31
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%cmp20 = icmp sgt i32 %0, 0, !dbg !35
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br i1 %cmp20, label %for.body.lr.ph, label %for.cond.cleanup, !dbg !36
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for.body.lr.ph: ; preds = %entry
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%1 = load i32, i32* @end, align 4, !tbaa !31
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br label %for.body, !dbg !36
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for.cond.cleanup: ; preds = %for.body, %entry
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; CHECK-LABEL: bb.{{.*}}.for.cond.cleanup:
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; CHECK: [[REG1:%[0-9]+]]:gr32 = PHI
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; CHECK-NEXT: DBG_VALUE [[REG1]]
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%x.0.lcssa = phi i32 [ 9, %entry ], [ %add, %for.body ]
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call void @llvm.dbg.value(metadata i32 %x.0.lcssa, metadata !15, metadata !DIExpression()), !dbg !26
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%2 = bitcast [80 x i32]* %arr to i8*, !dbg !37
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call void @llvm.lifetime.start.p0i8(i64 320, i8* nonnull %2) #3, !dbg !37
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call void @llvm.dbg.declare(metadata [80 x i32]* %arr, metadata !19, metadata !DIExpression()), !dbg !38
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call void @llvm.dbg.value(metadata i32 0, metadata !24, metadata !DIExpression()), !dbg !39
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br label %for.body4, !dbg !40
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for.body: ; preds = %for.body.lr.ph, %for.body
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; CHECK-LABEL: bb.{{.*}}.for.body:
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; CHECK: [[REG2:%[0-9]+]]:gr32 = PHI
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; CHECK-NEXT: [[REG3:%[0-9]+]]:gr32 = PHI
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; CHECK-NEXT: [[REG4:%[0-9]+]]:gr32 = PHI
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; CHECK-NEXT: DBG_VALUE [[REG2]]
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; CHECK-NEXT: DBG_VALUE [[REG3]]
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; CHECK-NEXT: DBG_VALUE [[REG4]]
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%u.023 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
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%y.022 = phi i32 [ 13, %for.body.lr.ph ], [ %mul, %for.body ]
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%x.021 = phi i32 [ 9, %for.body.lr.ph ], [ %add, %for.body ]
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call void @llvm.dbg.value(metadata i32 %u.023, metadata !17, metadata !DIExpression()), !dbg !28
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call void @llvm.dbg.value(metadata i32 %y.022, metadata !16, metadata !DIExpression()), !dbg !27
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call void @llvm.dbg.value(metadata i32 %x.021, metadata !15, metadata !DIExpression()), !dbg !26
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%add = add nuw nsw i32 %y.022, %x.021, !dbg !41
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%mul = mul nsw i32 %y.022, 3, !dbg !43
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%inc = add nuw nsw i32 %u.023, 1, !dbg !44
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call void @llvm.dbg.value(metadata i32 %inc, metadata !17, metadata !DIExpression()), !dbg !28
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call void @llvm.dbg.value(metadata i32 %mul, metadata !16, metadata !DIExpression()), !dbg !27
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call void @llvm.dbg.value(metadata i32 %add, metadata !15, metadata !DIExpression()), !dbg !26
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%cmp = icmp slt i32 %inc, %1, !dbg !35
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br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !36, !llvm.loop !45
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for.cond.cleanup3: ; preds = %for.body4
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call void @llvm.lifetime.end.p0i8(i64 320, i8* nonnull %2) #3, !dbg !47
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ret i32 %x.0.lcssa, !dbg !48
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for.body4: ; preds = %for.body4, %for.cond.cleanup
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%indvars.iv = phi i64 [ 0, %for.cond.cleanup ], [ %indvars.iv.next, %for.body4 ]
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call void @llvm.dbg.value(metadata i64 %indvars.iv, metadata !24, metadata !DIExpression()), !dbg !39
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%arrayidx = getelementptr inbounds [80 x i32], [80 x i32]* %arr, i64 0, i64 %indvars.iv, !dbg !49
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%3 = trunc i64 %indvars.iv to i32, !dbg !52
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%4 = add i32 %3, 3, !dbg !52
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store volatile i32 %4, i32* %arrayidx, align 4, !dbg !52, !tbaa !31
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !53
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call void @llvm.dbg.value(metadata i32 undef, metadata !24, metadata !DIExpression(DW_OP_plus_uconst, 1, DW_OP_stack_value)), !dbg !39
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%exitcond = icmp eq i64 %indvars.iv.next, 64, !dbg !54
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br i1 %exitcond, label %for.cond.cleanup3, label %for.body4, !dbg !40, !llvm.loop !55
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}
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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attributes #0 = { nounwind uwtable }
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attributes #1 = { argmemonly nounwind }
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attributes #2 = { nounwind readnone speculatable }
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attributes #3 = { nounwind }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!7, !8, !9}
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!llvm.ident = !{!10}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "end", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 7.0.0 (x)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
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!3 = !DIFile(filename: "debug.c", directory: "")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{i32 1, !"wchar_size", i32 4}
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!10 = !{!"clang version 7.0.0 (x)"}
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!11 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !12, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !2, retainedNodes: !14)
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!12 = !DISubroutineType(types: !13)
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!13 = !{!6}
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!14 = !{!15, !16, !17, !19, !24}
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!15 = !DILocalVariable(name: "x", scope: !11, file: !3, line: 4, type: !6)
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!16 = !DILocalVariable(name: "y", scope: !11, file: !3, line: 5, type: !6)
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!17 = !DILocalVariable(name: "u", scope: !18, file: !3, line: 6, type: !6)
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!18 = distinct !DILexicalBlock(scope: !11, file: !3, line: 6, column: 3)
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!19 = !DILocalVariable(name: "arr", scope: !11, file: !3, line: 11, type: !20)
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!20 = !DICompositeType(tag: DW_TAG_array_type, baseType: !21, size: 2560, elements: !22)
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!21 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !6)
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!22 = !{!23}
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!23 = !DISubrange(count: 80)
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!24 = !DILocalVariable(name: "q", scope: !25, file: !3, line: 12, type: !6)
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!25 = distinct !DILexicalBlock(scope: !11, file: !3, line: 12, column: 3)
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!26 = !DILocation(line: 4, column: 7, scope: !11)
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!27 = !DILocation(line: 5, column: 7, scope: !11)
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!28 = !DILocation(line: 6, column: 12, scope: !18)
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!29 = !DILocation(line: 6, column: 23, scope: !30)
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!30 = distinct !DILexicalBlock(scope: !18, file: !3, line: 6, column: 3)
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!31 = !{!32, !32, i64 0}
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!32 = !{!"int", !33, i64 0}
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!33 = !{!"omnipotent char", !34, i64 0}
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!34 = !{!"Simple C/C++ TBAA"}
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!35 = !DILocation(line: 6, column: 21, scope: !30)
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!36 = !DILocation(line: 6, column: 3, scope: !18)
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!37 = !DILocation(line: 11, column: 3, scope: !11)
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!38 = !DILocation(line: 11, column: 16, scope: !11)
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!39 = !DILocation(line: 12, column: 12, scope: !25)
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!40 = !DILocation(line: 12, column: 3, scope: !25)
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!41 = !DILocation(line: 7, column: 7, scope: !42)
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!42 = distinct !DILexicalBlock(scope: !30, file: !3, line: 6, column: 33)
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!43 = !DILocation(line: 8, column: 11, scope: !42)
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!44 = !DILocation(line: 6, column: 28, scope: !30)
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!45 = distinct !{!45, !36, !46}
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!46 = !DILocation(line: 9, column: 3, scope: !18)
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!47 = !DILocation(line: 17, column: 1, scope: !11)
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!48 = !DILocation(line: 16, column: 3, scope: !11)
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!49 = !DILocation(line: 13, column: 5, scope: !50)
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!50 = distinct !DILexicalBlock(scope: !51, file: !3, line: 12, column: 32)
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!51 = distinct !DILexicalBlock(scope: !25, file: !3, line: 12, column: 3)
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!52 = !DILocation(line: 13, column: 12, scope: !50)
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!53 = !DILocation(line: 12, column: 27, scope: !51)
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!54 = !DILocation(line: 12, column: 21, scope: !51)
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!55 = distinct !{!55, !40, !56}
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!56 = !DILocation(line: 14, column: 3, scope: !25)
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