derek.holloway
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42 lines
1.5 KiB
LLVM
42 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -S -passes=loop-unroll -unroll-runtime %s | FileCheck %s
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define i32 @pr131465(i1 %x) mustprogress {
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; CHECK-LABEL: define i32 @pr131465(
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; CHECK-SAME: i1 [[X:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[INC:%.*]] = zext i1 [[X]] to i32
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; CHECK-NEXT: br label %[[FOR_BODY:.*]]
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; CHECK: [[FOR_BODY]]:
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; CHECK-NEXT: [[INDVAR:%.*]] = phi i32 [ 2, %[[ENTRY]] ], [ [[NEXT_1:%.*]], %[[FOR_BODY_1:.*]] ]
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; CHECK-NEXT: [[NEXT:%.*]] = add nsw i32 [[INDVAR]], [[INC]]
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[NEXT]], 2
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; CHECK-NEXT: br i1 [[EXITCOND]], label %[[FOR_END:.*]], label %[[FOR_BODY_1]]
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; CHECK: [[FOR_BODY_1]]:
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; CHECK-NEXT: [[NEXT_1]] = add nsw i32 [[NEXT]], [[INC]]
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; CHECK-NEXT: [[EXITCOND_1:%.*]] = icmp eq i32 [[NEXT_1]], 2
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; CHECK-NEXT: br i1 [[EXITCOND_1]], label %[[FOR_END]], label %[[FOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
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; CHECK: [[FOR_END]]:
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%inc = zext i1 %x to i32
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br label %for.body
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for.body:
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%indvar = phi i32 [ 2, %entry ], [ %next, %for.body ]
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%next = add nsw i32 %indvar, %inc
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%exitcond = icmp eq i32 %next, 2
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !0
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for.end:
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ret i32 0
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}
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; Force runtime unrolling.
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!0 = !{!0, !{!"llvm.loop.unroll.count", i32 2}}
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;.
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; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]]}
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; CHECK: [[META1]] = !{!"llvm.loop.unroll.disable"}
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;.
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