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142 lines
5.0 KiB
142 lines
5.0 KiB
; RUN: llc < %s -stop-after=virtregrewriter -o - | FileCheck %s
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;
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; Generated with "clang++ -g -O1 -S -emit-llvm"
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;
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; inline bool bar(char c) {
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; return c >= '0' && c <= '9';
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; }
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;
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; unsigned foo(const char* data,
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; int length,
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; int* parsing_result) {
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; unsigned value = 0;
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; int result = 1;
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; bool overflow = 0;
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;
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; while (bar(*data)) {
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; if (value > 1) {
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; result = 2;
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; overflow = 1;
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; }
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;
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; if (!overflow)
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; value = value + 1;
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; }
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;
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; if (length == 0 || value) {
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; if (!overflow)
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; result = 0;
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; } else {
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; result = 1;
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; }
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; bye:
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; *parsing_result = result;
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; return result == 0 ? value : 0;
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; }
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;
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; CHECK: {{^body:}}
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; CHECK: bye.thread21:
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; CHECK: DBG_LABEL !14
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; CHECK: if.then5:
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; CHECK: DBG_LABEL !14
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; CHECK-NOT: DBG_LABEL !14
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$_Z3barc = comdat any
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; Function Attrs: nounwind uwtable
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define dso_local i32 @_Z3fooPKciPi(i8* nocapture readonly %data, i32 %length, i32* nocapture %parsing_result) local_unnamed_addr !dbg !4 {
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entry:
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%0 = load i8, i8* %data, align 1
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%call23 = tail call zeroext i1 @_Z3barc(i8 signext %0), !dbg !15
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br i1 %call23, label %while.body, label %while.end
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while.body: ; preds = %entry, %while.body
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%overflow.026 = phi i8 [ %spec.select18, %while.body ], [ 0, %entry ]
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%result.025 = phi i32 [ %spec.select, %while.body ], [ 1, %entry ]
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%value.024 = phi i32 [ %value.1, %while.body ], [ 0, %entry ]
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%cmp = icmp ugt i32 %value.024, 1
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%spec.select = select i1 %cmp, i32 2, i32 %result.025
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%spec.select18 = select i1 %cmp, i8 1, i8 %overflow.026
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%1 = and i8 %spec.select18, 1
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%2 = xor i8 %1, 1
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%3 = zext i8 %2 to i32
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%value.1 = add i32 %value.024, %3
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%4 = load i8, i8* %data, align 1
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%call = tail call zeroext i1 @_Z3barc(i8 signext %4), !dbg !15
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br i1 %call, label %while.body, label %while.end.loopexit
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while.end.loopexit: ; preds = %while.body
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%phitmp = and i8 %spec.select18, 1
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br label %while.end
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while.end: ; preds = %while.end.loopexit, %entry
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%value.0.lcssa = phi i32 [ 0, %entry ], [ %value.1, %while.end.loopexit ]
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%result.0.lcssa = phi i32 [ 1, %entry ], [ %spec.select, %while.end.loopexit ]
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%overflow.0.lcssa = phi i8 [ 0, %entry ], [ %phitmp, %while.end.loopexit ]
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%cmp3 = icmp eq i32 %length, 0
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%tobool4 = icmp ne i32 %value.0.lcssa, 0
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%or.cond = or i1 %cmp3, %tobool4
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br i1 %or.cond, label %if.then5, label %bye.thread21
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bye.thread21: ; preds = %while.end
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call void @llvm.dbg.label(metadata !14), !dbg !16
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store i32 1, i32* %parsing_result, align 4
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br label %6
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if.then5: ; preds = %while.end
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%tobool6 = icmp eq i8 %overflow.0.lcssa, 0
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call void @llvm.dbg.label(metadata !14), !dbg !16
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call void @llvm.dbg.label(metadata !14), !dbg !16
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br i1 %tobool6, label %bye.thread, label %bye
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bye.thread: ; preds = %if.then5
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store i32 0, i32* %parsing_result, align 4
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br label %5
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bye: ; preds = %if.then5
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store i32 %result.0.lcssa, i32* %parsing_result, align 4
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%cmp10 = icmp eq i32 %result.0.lcssa, 0
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br i1 %cmp10, label %5, label %6
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; <label>:5: ; preds = %bye.thread, %bye
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br label %6
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; <label>:6: ; preds = %bye.thread21, %bye, %5
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%7 = phi i32 [ %value.0.lcssa, %5 ], [ 0, %bye ], [ 0, %bye.thread21 ]
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ret i32 %7
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}
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; Function Attrs: inlinehint nounwind uwtable
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define linkonce_odr dso_local zeroext i1 @_Z3barc(i8 signext %c) local_unnamed_addr comdat {
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entry:
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%c.off = add i8 %c, -48
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%0 = icmp ult i8 %c.off, 10
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ret i1 %0
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.label(metadata) #0
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attributes #0 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "live-debug-label.cc", directory: ".")
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!2 = !{}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooPKciPi", scope: !1, file: !1, line: 5, type: !5, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !13)
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!5 = !DISubroutineType(types: !6)
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!6 = !{!7, !8, !11, !12}
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!7 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64)
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!9 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !10)
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!10 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)
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!13 = !{!14}
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!14 = !DILabel(scope: !4, name: "bye", file: !1, line: 28)
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!15 = !DILocation(line: 12, column: 10, scope: !4)
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!16 = !DILocation(line: 28, column: 1, scope: !4)
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