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23c462a8b5
This allows targets to make more decisions about reserved registers after isel. For example, now it should be certain there are calls or stack objects in the frame or not, which could have been introduced by legalization. Patch by Matthias Braun llvm-svn: 363757
170 lines
8.3 KiB
LLVM
170 lines
8.3 KiB
LLVM
; 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 phi-split.c program,
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; using: clang phi-split.c -g -O1 -S -o - --target=i386 -emit-llvm
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; --------------------------------------
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; long long end = 10;
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;
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; int main() {
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; long long x = 9;
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; long long y = 13;
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; for (long long 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 long long arr[80];
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; for (long long 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 = 'phi-split.c'
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source_filename = "phi-split.c"
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target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
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target triple = "i386"
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@end = dso_local local_unnamed_addr global i64 10, align 8, !dbg !0
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; Function Attrs: nounwind
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define dso_local i32 @main() local_unnamed_addr #0 !dbg !12 {
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; CHECK-LABEL: name: main
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entry:
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%arr = alloca [80 x i64], align 8
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call void @llvm.dbg.value(metadata i64 9, metadata !17, metadata !DIExpression()), !dbg !28
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call void @llvm.dbg.value(metadata i64 13, metadata !18, metadata !DIExpression()), !dbg !29
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call void @llvm.dbg.value(metadata i64 0, metadata !19, metadata !DIExpression()), !dbg !30
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%0 = load i64, i64* @end, align 8, !dbg !31
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%cmp20 = icmp sgt i64 %0, 0, !dbg !37
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br i1 %cmp20, label %for.body.lr.ph, label %for.cond.cleanup, !dbg !38
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for.body.lr.ph: ; preds = %entry
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%1 = load i64, i64* @end, align 8
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br label %for.body, !dbg !38
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for.cond.cleanup.loopexit: ; preds = %for.body
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%extract.t = trunc i64 %add to i32, !dbg !38
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br label %for.cond.cleanup, !dbg !39
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for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
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%x.0.lcssa.off0 = phi i32 [ 9, %entry ], [ %extract.t, %for.cond.cleanup.loopexit ]
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call void @llvm.dbg.value(metadata i64 undef, metadata !17, metadata !DIExpression()), !dbg !28
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%2 = bitcast [80 x i64]* %arr to i8*, !dbg !39
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call void @llvm.dbg.value(metadata i64 0, metadata !26, metadata !DIExpression()), !dbg !41
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br label %for.body4, !dbg !42
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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: [[REG5:%[0-9]+]]:gr32_nosp = PHI
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; CHECK-NEXT: [[REG6:%[0-9]+]]:gr32 = PHI
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; CHECK-NEXT: [[REG7:%[0-9]+]]:gr32 = PHI
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; CHECK-NEXT: DBG_VALUE [[REG2]], $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
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; CHECK-NEXT: DBG_VALUE [[REG3]], $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
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; CHECK-NEXT: DBG_VALUE [[REG4]], $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
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; CHECK-NEXT: DBG_VALUE [[REG5]], $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
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; CHECK-NEXT: DBG_VALUE [[REG6]], $noreg, !17, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
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; CHECK-NEXT: DBG_VALUE [[REG7]], $noreg, !17, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
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%u.023 = phi i64 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
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%y.022 = phi i64 [ 13, %for.body.lr.ph ], [ %mul, %for.body ]
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%x.021 = phi i64 [ 9, %for.body.lr.ph ], [ %add, %for.body ]
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call void @llvm.dbg.value(metadata i64 %u.023, metadata !19, metadata !DIExpression()), !dbg !30
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call void @llvm.dbg.value(metadata i64 %y.022, metadata !18, metadata !DIExpression()), !dbg !29
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call void @llvm.dbg.value(metadata i64 %x.021, metadata !17, metadata !DIExpression()), !dbg !28
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%add = add nuw nsw i64 %y.022, %x.021, !dbg !43
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%mul = mul nsw i64 %y.022, 3, !dbg !45
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%inc = add nuw nsw i64 %u.023, 1, !dbg !46
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call void @llvm.dbg.value(metadata i64 %inc, metadata !19, metadata !DIExpression()), !dbg !30
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call void @llvm.dbg.value(metadata i64 %mul, metadata !18, metadata !DIExpression()), !dbg !29
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call void @llvm.dbg.value(metadata i64 %add, metadata !17, metadata !DIExpression()), !dbg !28
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%cmp = icmp slt i64 %inc, %1, !dbg !37
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br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit, !dbg !38, !llvm.loop !47
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for.cond.cleanup3: ; preds = %for.body4
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ret i32 %x.0.lcssa.off0, !dbg !50
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for.body4: ; preds = %for.cond.cleanup, %for.body4
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%q.019 = phi i64 [ 0, %for.cond.cleanup ], [ %inc7, %for.body4 ]
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call void @llvm.dbg.value(metadata i64 %q.019, metadata !26, metadata !DIExpression()), !dbg !41
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%add5 = add nuw nsw i64 %q.019, 3, !dbg !51
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%idxprom = trunc i64 %q.019 to i32, !dbg !54
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%arrayidx = getelementptr inbounds [80 x i64], [80 x i64]* %arr, i32 0, i32 %idxprom, !dbg !54
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store volatile i64 %add5, i64* %arrayidx, align 8, !dbg !55
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%inc7 = add nuw nsw i64 %q.019, 1, !dbg !56
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call void @llvm.dbg.value(metadata i64 %inc7, metadata !26, metadata !DIExpression()), !dbg !41
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%cmp2 = icmp ult i64 %inc7, 64, !dbg !57
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br i1 %cmp2, label %for.body4, label %for.cond.cleanup3, !dbg !42, !llvm.loop !58
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!7, !8, !9, !10}
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!llvm.ident = !{!11}
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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: "phi-split.c", directory: "")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
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!7 = !{i32 1, !"NumRegisterParameters", i32 0}
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!8 = !{i32 2, !"Dwarf Version", i32 4}
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!9 = !{i32 2, !"Debug Info Version", i32 3}
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!10 = !{i32 1, !"wchar_size", i32 4}
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!11 = !{!"clang version 7.0.0 (x)"}
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!12 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !13, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !2, retainedNodes: !16)
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!13 = !DISubroutineType(types: !14)
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!14 = !{!15}
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!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!16 = !{!17, !18, !19, !21, !26}
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!17 = !DILocalVariable(name: "x", scope: !12, file: !3, line: 4, type: !6)
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!18 = !DILocalVariable(name: "y", scope: !12, file: !3, line: 5, type: !6)
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!19 = !DILocalVariable(name: "u", scope: !20, file: !3, line: 6, type: !6)
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!20 = distinct !DILexicalBlock(scope: !12, file: !3, line: 6, column: 3)
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!21 = !DILocalVariable(name: "arr", scope: !12, file: !3, line: 11, type: !22)
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!22 = !DICompositeType(tag: DW_TAG_array_type, baseType: !23, size: 5120, elements: !24)
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!23 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !6)
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!24 = !{!25}
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!25 = !DISubrange(count: 80)
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!26 = !DILocalVariable(name: "q", scope: !27, file: !3, line: 12, type: !6)
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!27 = distinct !DILexicalBlock(scope: !12, file: !3, line: 12, column: 3)
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!28 = !DILocation(line: 4, column: 13, scope: !12)
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!29 = !DILocation(line: 5, column: 13, scope: !12)
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!30 = !DILocation(line: 6, column: 18, scope: !20)
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!31 = !DILocation(line: 6, column: 29, scope: !32)
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!32 = distinct !DILexicalBlock(scope: !20, file: !3, line: 6, column: 3)
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!37 = !DILocation(line: 6, column: 27, scope: !32)
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!38 = !DILocation(line: 6, column: 3, scope: !20)
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!39 = !DILocation(line: 11, column: 3, scope: !12)
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!40 = !DILocation(line: 11, column: 22, scope: !12)
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!41 = !DILocation(line: 12, column: 18, scope: !27)
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!42 = !DILocation(line: 12, column: 3, scope: !27)
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!43 = !DILocation(line: 7, column: 7, scope: !44)
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!44 = distinct !DILexicalBlock(scope: !32, file: !3, line: 6, column: 39)
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!45 = !DILocation(line: 8, column: 11, scope: !44)
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!46 = !DILocation(line: 6, column: 34, scope: !32)
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!47 = distinct !{!47, !38, !48}
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!48 = !DILocation(line: 9, column: 3, scope: !20)
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!50 = !DILocation(line: 16, column: 3, scope: !12)
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!51 = !DILocation(line: 13, column: 16, scope: !52)
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!52 = distinct !DILexicalBlock(scope: !53, file: !3, line: 12, column: 38)
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!53 = distinct !DILexicalBlock(scope: !27, file: !3, line: 12, column: 3)
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!54 = !DILocation(line: 13, column: 5, scope: !52)
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!55 = !DILocation(line: 13, column: 12, scope: !52)
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!56 = !DILocation(line: 12, column: 33, scope: !53)
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!57 = !DILocation(line: 12, column: 27, scope: !53)
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!58 = distinct !{!58, !42, !59}
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!59 = !DILocation(line: 14, column: 3, scope: !27)
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