103 lines
5.2 KiB
LLVM
103 lines
5.2 KiB
LLVM
; RUN: opt -instcombine %s -S | FileCheck %s
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;
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; Generate me from:
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; clang -cc1 -triple thumbv7-apple-ios7.0.0 -S -target-abi apcs-gnu -gdwarf-2 -Os test.c -o test.ll -emit-llvm
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; void run(float r)
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; {
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; int count = r;
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; float vla[count];
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; vla[0] = r;
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; for (int i = 0; i < count; i++)
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; vla[i] /= r;
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; }
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; rdar://problem/15464571
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;
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; ModuleID = 'test.c'
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target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n32-S32"
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target triple = "thumbv7-apple-ios8.0.0"
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; Function Attrs: nounwind optsize readnone
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define void @run(float %r) #0 !dbg !4 {
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entry:
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tail call void @llvm.dbg.declare(metadata float %r, metadata !11, metadata !DIExpression()), !dbg !22
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%conv = fptosi float %r to i32, !dbg !23
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tail call void @llvm.dbg.declare(metadata i32 %conv, metadata !12, metadata !DIExpression()), !dbg !23
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%vla = alloca float, i32 %conv, align 4, !dbg !24
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tail call void @llvm.dbg.declare(metadata float* %vla, metadata !14, metadata !DIExpression(DW_OP_deref)), !dbg !24
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; The VLA alloca should be described by a dbg.declare:
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; CHECK: call void @llvm.dbg.declare(metadata float* %vla, metadata ![[VLA:.*]], metadata {{.*}})
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; The VLA alloca and following store into the array should not be lowered to like this:
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; CHECK-NOT: call void @llvm.dbg.value(metadata float %r, metadata ![[VLA]])
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; the backend interprets this as "vla has the location of %r".
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store float %r, float* %vla, align 4, !dbg !25, !tbaa !26
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tail call void @llvm.dbg.value(metadata i32 0, metadata !18, metadata !DIExpression()), !dbg !30
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%cmp8 = icmp sgt i32 %conv, 0, !dbg !30
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br i1 %cmp8, label %for.body, label %for.end, !dbg !30
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for.body: ; preds = %entry, %for.body.for.body_crit_edge
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%0 = phi float [ %.pre, %for.body.for.body_crit_edge ], [ %r, %entry ]
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%i.09 = phi i32 [ %inc, %for.body.for.body_crit_edge ], [ 0, %entry ]
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%arrayidx2 = getelementptr inbounds float, float* %vla, i32 %i.09, !dbg !31
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%div = fdiv float %0, %r, !dbg !31
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store float %div, float* %arrayidx2, align 4, !dbg !31, !tbaa !26
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%inc = add nsw i32 %i.09, 1, !dbg !30
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tail call void @llvm.dbg.value(metadata i32 %inc, metadata !18, metadata !DIExpression()), !dbg !30
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%exitcond = icmp eq i32 %inc, %conv, !dbg !30
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br i1 %exitcond, label %for.end, label %for.body.for.body_crit_edge, !dbg !30
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for.body.for.body_crit_edge: ; preds = %for.body
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%arrayidx2.phi.trans.insert = getelementptr inbounds float, float* %vla, i32 %inc
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%.pre = load float, float* %arrayidx2.phi.trans.insert, align 4, !dbg !31, !tbaa !26
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br label %for.body, !dbg !30
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for.end: ; preds = %for.body, %entry
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ret void, !dbg !32
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind optsize readnone "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!20, !33}
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!llvm.ident = !{!21}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.4 ", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
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!1 = !DIFile(filename: "<unknown>", directory: "/Volumes/Data/radar/15464571")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "run", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 2, file: !5, scope: !6, type: !7, retainedNodes: !10)
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!5 = !DIFile(filename: "test.c", directory: "/Volumes/Data/radar/15464571")
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!6 = !DIFile(filename: "test.c", directory: "/Volumes/Data/radar/15464571")
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!7 = !DISubroutineType(types: !8)
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!8 = !{null, !9}
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!9 = !DIBasicType(tag: DW_TAG_base_type, name: "float", size: 32, align: 32, encoding: DW_ATE_float)
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!10 = !{!11, !12, !14, !18}
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!11 = !DILocalVariable(name: "r", line: 1, arg: 1, scope: !4, file: !6, type: !9)
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!12 = !DILocalVariable(name: "count", line: 3, scope: !4, file: !6, type: !13)
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!13 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!14 = !DILocalVariable(name: "vla", line: 4, scope: !4, file: !6, type: !15)
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!15 = !DICompositeType(tag: DW_TAG_array_type, align: 32, baseType: !9, elements: !16)
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!16 = !{!17}
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!17 = !DISubrange(count: -1)
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!18 = !DILocalVariable(name: "i", line: 6, scope: !19, file: !6, type: !13)
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!19 = distinct !DILexicalBlock(line: 6, column: 0, file: !5, scope: !4)
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!20 = !{i32 2, !"Dwarf Version", i32 2}
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!21 = !{!"clang version 3.4 "}
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!22 = !DILocation(line: 1, scope: !4)
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!23 = !DILocation(line: 3, scope: !4)
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!24 = !DILocation(line: 4, scope: !4)
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!25 = !DILocation(line: 5, scope: !4)
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!26 = !{!27, !27, i64 0}
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!27 = !{!"float", !28, i64 0}
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!28 = !{!"omnipotent char", !29, i64 0}
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!29 = !{!"Simple C/C++ TBAA"}
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!30 = !DILocation(line: 6, scope: !19)
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!31 = !DILocation(line: 7, scope: !19)
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!32 = !DILocation(line: 8, scope: !4)
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!33 = !{i32 1, !"Debug Info Version", i32 3}
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