derek.holloway
7502bf64a4
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52 lines
1.7 KiB
LLVM
52 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=indvars < %s | FileCheck %s
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declare void @use(i1)
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define void @test(ptr %arr) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
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; CHECK: loop.header:
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; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_INC:%.*]], [[LOOP_LATCH:%.*]] ], [ 0, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[PREV:%.*]] = phi i32 [ [[V:%.*]], [[LOOP_LATCH]] ], [ 0, [[ENTRY]] ]
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; CHECK-NEXT: [[PTR:%.*]] = getelementptr inbounds i32, ptr [[ARR:%.*]], i64 [[IV]]
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; CHECK-NEXT: [[V]] = load i32, ptr [[PTR]], align 4
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; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[V]], 0
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; CHECK-NEXT: br i1 [[CMP1]], label [[IF:%.*]], label [[LOOP_LATCH]]
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; CHECK: if:
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; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[PREV]], 0
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; CHECK-NEXT: call void @use(i1 [[CMP2]])
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; CHECK-NEXT: br label [[LOOP_LATCH]]
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; CHECK: loop.latch:
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; CHECK-NEXT: [[IV_INC]] = add nuw nsw i64 [[IV]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp samesign ult i64 [[IV_INC]], 16
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; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_HEADER]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop.header
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loop.header:
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%iv = phi i64 [ %iv.inc, %loop.latch ], [ 0, %entry ]
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%prev = phi i32 [ %v, %loop.latch ], [ 0, %entry ]
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%ptr = getelementptr inbounds i32, ptr %arr, i64 %iv
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%v = load i32, ptr %ptr
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%cmp1 = icmp sgt i32 %v, 0
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br i1 %cmp1, label %if, label %loop.latch
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if:
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%cmp2 = icmp slt i32 %prev, 0
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call void @use(i1 %cmp2)
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br label %loop.latch
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loop.latch:
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%iv.inc = add nuw nsw i64 %iv, 1
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%cmp = icmp ult i64 %iv.inc, 16
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br i1 %cmp, label %loop.header, label %exit
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exit:
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ret void
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}
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