derek.holloway
7502bf64a4
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76 lines
3.3 KiB
LLVM
76 lines
3.3 KiB
LLVM
; RUN: opt -passes='simple-loop-unswitch<nontrivial>' -S < %s | FileCheck %s
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define i32 @basic(i32 %N, i1 %cond, i32 %select_input) !dbg !5 {
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; CHECK-LABEL: define i32 @basic(
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; Check that SimpleLoopUnswitch's unswitchNontrivialInvariants() drops the
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; debug location of the hoisted terminator and doesn't give any debug location
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; to the new freeze, since it's inserted in a hoist block.
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; Also check that in unswitchNontrivialInvariants(), the new br instruction
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; inherits the debug location of the old terminator in the same block.
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; CHECK: entry:
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; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[COND:%.*]]{{$}}
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; CHECK-NEXT: br i1 [[COND_FR]], label %[[ENTRY_SPLIT_US:.*]], label %[[ENTRY_SPLIT:.*]]{{$}}
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; CHECK: for.body.us:
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; CHECK-NEXT: br label %0, !dbg [[DBG13:![0-9]+]]
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; Check that in turnSelectIntoBranch(), the new phi inherits the debug
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; location of the old select instruction replaced.
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; CHECK: 1:
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; CHECK-NEXT: [[UNSWITCHED_SELECT_US:%.*]] = phi i32 [ [[SELECT_INPUT:%.*]], %0 ], !dbg [[DBG13]]
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; Check that in BuildClonedLoopBlocks(), the new phi inherits the debug
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; location of the instruction at the insertion point and the new br
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; instruction inherits the debug location of the old terminator.
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; CHECK: for.body:
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; CHECK-NEXT: br label %2, !dbg [[DBG13]]
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; CHECK: for.cond.cleanup:
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; CHECK: [[DOTUS_PHI:%.*]] = phi i32 [ [[RES_LCSSA:%.*]], %[[FOR_COND_CLEANUP_SPLIT:.*]] ], [ [[RES_LCSSA_US:%.*]], %[[FOR_COND_CLEANUP_SPLIT_US:.*]] ], !dbg [[DBG17:![0-9]+]]
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entry:
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br label %for.cond, !dbg !8
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for.cond: ; preds = %for.body, %entry
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%res = phi i32 [ 0, %entry ], [ %add, %for.body ], !dbg !9
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%i = phi i32 [ 0, %entry ], [ %inc, %for.body ], !dbg !10
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%cmp = icmp slt i32 %i, %N, !dbg !11
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br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !12
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for.body: ; preds = %for.cond
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%cond1 = select i1 %cond, i32 %select_input, i32 42, !dbg !13
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%add = add nuw nsw i32 %cond1, %res, !dbg !14
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%inc = add nuw nsw i32 %i, 1, !dbg !15
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br label %for.cond, !dbg !16
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for.cond.cleanup: ; preds = %for.cond
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ret i32 %res, !dbg !17
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}
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!llvm.dbg.cu = !{!0}
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!llvm.debugify = !{!2, !3}
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!llvm.module.flags = !{!4}
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; CHECK: [[DBG13]] = !DILocation(line: 6,
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; CHECK: [[DBG17]] = !DILocation(line: 10,
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "main.ll", directory: "/")
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!2 = !{i32 10}
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!3 = !{i32 0}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = distinct !DISubprogram(name: "basic", linkageName: "basic", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
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!6 = !DISubroutineType(types: !7)
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!7 = !{}
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!8 = !DILocation(line: 1, column: 1, scope: !5)
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!9 = !DILocation(line: 2, column: 1, scope: !5)
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!10 = !DILocation(line: 3, column: 1, scope: !5)
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!11 = !DILocation(line: 4, column: 1, scope: !5)
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!12 = !DILocation(line: 5, column: 1, scope: !5)
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!13 = !DILocation(line: 6, column: 1, scope: !5)
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!14 = !DILocation(line: 7, column: 1, scope: !5)
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!15 = !DILocation(line: 8, column: 1, scope: !5)
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!16 = !DILocation(line: 9, column: 1, scope: !5)
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!17 = !DILocation(line: 10, column: 1, scope: !5)
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