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; RUN: llc < %s
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32"
target triple = "thumbv7-apple-darwin3.0.0-iphoneos"
@length = common global i32 0, align 4 ; <i32*> [#uses=1]
define void @x0(i8* nocapture %buf, i32 %nbytes) nounwind optsize {
entry:
tail call void @llvm.dbg.value(metadata i8* %buf, i64 0, metadata !0, metadata !MDExpression()), !dbg !15
tail call void @llvm.dbg.value(metadata i32 %nbytes, i64 0, metadata !8, metadata !MDExpression()), !dbg !16
%tmp = load i32, i32* @length, !dbg !17 ; <i32> [#uses=3]
%cmp = icmp eq i32 %tmp, -1, !dbg !17 ; <i1> [#uses=1]
%cmp.not = xor i1 %cmp, true ; <i1> [#uses=1]
%cmp3 = icmp ult i32 %tmp, %nbytes, !dbg !17 ; <i1> [#uses=1]
%or.cond = and i1 %cmp.not, %cmp3 ; <i1> [#uses=1]
tail call void @llvm.dbg.value(metadata i32 %tmp, i64 0, metadata !8, metadata !MDExpression()), !dbg !17
%nbytes.addr.0 = select i1 %or.cond, i32 %tmp, i32 %nbytes ; <i32> [#uses=1]
tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !10, metadata !MDExpression()), !dbg !19
br label %while.cond, !dbg !20
while.cond: ; preds = %while.body, %entry
%0 = phi i32 [ 0, %entry ], [ %inc, %while.body ] ; <i32> [#uses=3]
%buf.addr.0 = getelementptr i8, i8* %buf, i32 %0 ; <i8*> [#uses=1]
%cmp7 = icmp ult i32 %0, %nbytes.addr.0, !dbg !20 ; <i1> [#uses=1]
br i1 %cmp7, label %land.rhs, label %while.end, !dbg !20
land.rhs: ; preds = %while.cond
%call = tail call i32 @x1() nounwind optsize, !dbg !20 ; <i32> [#uses=2]
%cmp9 = icmp eq i32 %call, -1, !dbg !20 ; <i1> [#uses=1]
br i1 %cmp9, label %while.end, label %while.body, !dbg !20
while.body: ; preds = %land.rhs
%conv = trunc i32 %call to i8, !dbg !21 ; <i8> [#uses=1]
store i8 %conv, i8* %buf.addr.0, !dbg !21
%inc = add i32 %0, 1, !dbg !23 ; <i32> [#uses=1]
br label %while.cond, !dbg !24
while.end: ; preds = %land.rhs, %while.cond
ret void, !dbg !25
}
declare i32 @x1() optsize
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone
!llvm.dbg.lv.fn = !{!0, !8, !10, !12}
!llvm.dbg.gv = !{!14}
!0 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "buf", line: 4, arg: 0, scope: !1, file: !2, type: !6)
!1 = !MDSubprogram(name: "x0", linkageName: "x0", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, file: !26, scope: null, type: !4)
!2 = !MDFile(filename: "t.c", directory: "/private/tmp")
!3 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang 2.0", isOptimized: true, file: !26)
!4 = !MDSubroutineType(types: !5)
!5 = !{null}
!6 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, file: !26, scope: !2, baseType: !7)
!7 = !MDBasicType(tag: DW_TAG_base_type, name: "unsigned char", size: 8, align: 8, encoding: DW_ATE_unsigned_char)
!8 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "nbytes", line: 4, arg: 0, scope: !1, file: !2, type: !9)
!9 = !MDBasicType(tag: DW_TAG_base_type, name: "unsigned long", size: 32, align: 32, encoding: DW_ATE_unsigned)
!10 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "nread", line: 6, scope: !11, file: !2, type: !9)
!11 = distinct !MDLexicalBlock(line: 5, column: 1, file: !26, scope: !1)
!12 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "c", line: 7, scope: !11, file: !2, type: !13)
!13 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!14 = !MDGlobalVariable(name: "length", linkageName: "length", line: 1, isLocal: false, isDefinition: true, scope: !2, file: !2, type: !13, variable: i32* @length)
!15 = !MDLocation(line: 4, column: 24, scope: !1)
!16 = !MDLocation(line: 4, column: 43, scope: !1)
!17 = !MDLocation(line: 9, column: 2, scope: !11)
!18 = !{i32 0}
!19 = !MDLocation(line: 10, column: 2, scope: !11)
!20 = !MDLocation(line: 11, column: 2, scope: !11)
!21 = !MDLocation(line: 12, column: 3, scope: !22)
!22 = distinct !MDLexicalBlock(line: 11, column: 45, file: !26, scope: !11)
!23 = !MDLocation(line: 13, column: 3, scope: !22)
!24 = !MDLocation(line: 14, column: 2, scope: !22)
!25 = !MDLocation(line: 15, column: 1, scope: !11)
!26 = !MDFile(filename: "t.c", directory: "/private/tmp")
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