| ; RUN: opt -S -loop-reduce < %s | FileCheck %s |
| |
| ; During Loop Strength Reduce, if the terminating condition for the loop is not |
| ; immediately adjacent to the terminating branch and it has more than one use, |
| ; a clone of the condition will be created just before the terminating branch |
| ; and will be used as the branch condition. |
| ; The purpose of this test is to check that the presence of a debug intrinsic |
| ; between the condition and branch does not trigger this behaviour, as this |
| ; would cause debug info to affect CodeGen. |
| |
| ; CHECK-LABEL: i: |
| ; CHECK-NOT: icmp |
| ; CHECK: [[COND:%.*]] = icmp eq i8 |
| ; CHECK-NEXT: call void @llvm.dbg.value(metadata i1 [[COND]] |
| ; CHECK-NEXT: br i1 [[COND]] |
| |
| |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @b = dso_local local_unnamed_addr global i8 0, align 1, !dbg !0 |
| @a = dso_local local_unnamed_addr global i32 0, align 4, !dbg !6 |
| @c = dso_local local_unnamed_addr global i8 0, align 1, !dbg !9 |
| define dso_local signext i16 @d() local_unnamed_addr !dbg !17 { |
| entry: |
| %0 = load i32, i32* @a, align 4 |
| %tobool2.not = icmp eq i32 %0, 0 |
| %1 = load i8, i8* @b, align 1, !dbg !24 |
| %cmp.not13 = icmp eq i8 %1, 7, !dbg !24 |
| br i1 %cmp.not13, label %cleanup, label %if.end.preheader, !dbg !24 |
| |
| if.end.preheader: ; preds = %entry |
| br label %if.end, !dbg !24 |
| |
| if.end: ; preds = %if.end.preheader, %i |
| %2 = phi i8 [ %add, %i ], [ %1, %if.end.preheader ] |
| br i1 %tobool2.not, label %i, label %if.end4, !dbg !24 |
| |
| if.end4: ; preds = %if.end |
| %conv5 = trunc i32 %0 to i16, !dbg !24 |
| br label %cleanup, !dbg !24 |
| |
| i: ; preds = %if.end |
| %add = add i8 %2, 1, !dbg !24 |
| store i8 %add, i8* @b, align 1, !dbg !24 |
| %cmp.not = icmp eq i8 %add, 7, !dbg !24 |
| call void @llvm.dbg.value(metadata i1 %cmp.not, metadata !23, metadata !DIExpression(DW_OP_LLVM_convert, 1, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_stack_value)), !dbg !24 |
| br i1 %cmp.not, label %cleanup.loopexit, label %if.end, !dbg !24 |
| |
| cleanup.loopexit: ; preds = %i |
| br label %cleanup |
| |
| cleanup: ; preds = %cleanup.loopexit, %if.end4, %entry |
| %cmp.not12 = phi i1 [ %cmp.not13, %if.end4 ], [ %cmp.not13, %entry ], [ %cmp.not, %cleanup.loopexit ] |
| %retval.0 = phi i16 [ %conv5, %if.end4 ], [ undef, %entry ], [ undef, %cleanup.loopexit ] |
| %3 = load i8, i8* @c, align 1 |
| %conv8 = sext i8 %3 to i16 |
| %retval.1 = select i1 %cmp.not12, i16 %conv8, i16 %retval.0 |
| ret i16 %retval.1, !dbg !24 |
| } |
| |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!12, !13, !14, !15} |
| !llvm.ident = !{!16} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 2, type: !11, isLocal: false, isDefinition: true) |
| !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 13.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None) |
| !3 = !DIFile(filename: "lsr-cond-dbg.c", directory: "/") |
| !4 = !{} |
| !5 = !{!6, !0, !9} |
| !6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression()) |
| !7 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true) |
| !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !9 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression()) |
| !10 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 2, type: !11, isLocal: false, isDefinition: true) |
| !11 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) |
| !12 = !{i32 7, !"Dwarf Version", i32 4} |
| !13 = !{i32 2, !"Debug Info Version", i32 3} |
| !14 = !{i32 1, !"wchar_size", i32 4} |
| !15 = !{i32 7, !"uwtable", i32 1} |
| !16 = !{!"clang version 13.0.0"} |
| !17 = distinct !DISubprogram(name: "d", scope: !3, file: !3, line: 3, type: !18, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !21) |
| !18 = !DISubroutineType(types: !19) |
| !19 = !{!20} |
| !20 = !DIBasicType(name: "short", size: 16, encoding: DW_ATE_signed) |
| !21 = !{!23} |
| !22 = distinct !DILexicalBlock(scope: !17, file: !3, line: 4, column: 3) |
| !23 = !DILocalVariable(name: "g", scope: !22, file: !3, line: 7, type: !8) |
| !24 = !DILocation(line: 5, column: 9, scope: !22) |
| |