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88 lines
3.5 KiB
88 lines
3.5 KiB
4 months ago
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; RUN: opt -codegenprepare -S < %s | FileCheck %s
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; RUN: opt -strip-debug -codegenprepare -S < %s | FileCheck %s
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; REQUIRES: x86-registered-target
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; In its current state, CodeGenPrepare should not optimize empty blocks after a switch
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; (See CodeGenPrepare::isMergingEmptyBlockProfitable)
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; This should also be the case when they contain debug information. (sw.bb block)
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; Check this by verifying that the switch labels remain the same
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; CHECK: while.cond:
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; CHECK-NEXT: switch i32 undef, label %sw.default [
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; CHECK-NEXT: i32 45, label %sw.bb
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; CHECK-NEXT: i32 104, label %while.cond.lbl_crit_edge
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; CHECK-NEXT: i32 122, label %while.cond.lbl_crit_edge
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; CHECK-NEXT: i32 115, label %while.cond134.preheader
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; CHECK-NEXT: i32 100, label %sw.bb29
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; CHECK-NEXT: i32 105, label %sw.bb29
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; CHECK-NEXT: ]
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; ModuleID = 'bugpoint-reduced-instructions.bc'
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source_filename = "foobar.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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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #0
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; Function Attrs: noinline nounwind uwtable
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define dso_local void @foobar(i32* nocapture %arg0) local_unnamed_addr #0 {
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entry:
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br label %while.cond
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while.cond: ; preds = %entry
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switch i32 undef, label %sw.default [
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i32 45, label %sw.bb
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i32 104, label %while.cond.lbl_crit_edge
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i32 122, label %while.cond.lbl_crit_edge
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i32 115, label %while.cond134.preheader
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i32 100, label %sw.bb29
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i32 105, label %sw.bb29
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]
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while.cond.lbl_crit_edge: ; preds = %while.cond, %while.cond
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br label %lbl
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while.cond134.preheader: ; preds = %while.cond
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unreachable
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sw.bb: ; preds = %while.cond
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call void @llvm.dbg.value(metadata i32 3, metadata !11, metadata !DIExpression()), !dbg !15
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br label %lbl
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sw.bb29: ; preds = %while.cond, %while.cond
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unreachable
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sw.default: ; preds = %while.cond
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unreachable
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lbl: ; preds = %sw.bb, %while.cond.lbl_crit_edge
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%var03.1 = phi i32 [ 0, %while.cond.lbl_crit_edge ], [ 3, %sw.bb ]
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unreachable
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}
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attributes #0 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!9, !10}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version XXX ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, globals: !2)
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!1 = !DIFile(filename: "foobar.c", directory: "./")
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!2 = !{}
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!3 = !{!4, !5}
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!4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!5 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !6, size: 64)
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!6 = !DISubroutineType(types: !7)
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!7 = !{!4, !4, !8}
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!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
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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 = !DILocalVariable(name: "var03", scope: !12, file: !1, line: 3, type: !4)
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!12 = distinct !DISubprogram(name: "foobar", scope: !1, file: !1, line: 2, type: !13, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!13 = !DISubroutineType(types: !14)
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!14 = !{null, !5, !8}
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!15 = !DILocation(line: 4, column: 16, scope: !12)
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