derek.holloway
7502bf64a4
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59 lines
2.7 KiB
LLVM
59 lines
2.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 5
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; RUN: opt -passes=loop-vectorize -force-vector-width=4 -S %s | FileCheck %s
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define void @pr125278(ptr %dst, i64 %n) {
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; CHECK-LABEL: define void @pr125278(
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; CHECK-SAME: ptr [[DST:%.*]], i64 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[TRUE_EXT:%.*]] = zext i1 true to i32
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; CHECK-NEXT: [[UMAX:%.*]] = call i64 @llvm.umax.i64(i64 [[N]], i64 1)
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; CHECK-NEXT: br label %[[COND:.*]]
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; CHECK: [[COND_LOOPEXIT:.*]]:
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; CHECK-NEXT: br label %[[COND]]
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; CHECK: [[COND]]:
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; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[UMAX]], 4
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; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
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; CHECK: [[VECTOR_PH]]:
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; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[UMAX]], 4
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; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[UMAX]], [[N_MOD_VF]]
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; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
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; CHECK: [[VECTOR_BODY]]:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
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; CHECK-NEXT: store i8 1, ptr [[DST]], align 1
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
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; CHECK-NEXT: [[TMP0:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
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; CHECK-NEXT: br i1 [[TMP0]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
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; CHECK: [[MIDDLE_BLOCK]]:
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; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[UMAX]], [[N_VEC]]
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; CHECK-NEXT: br i1 [[CMP_N]], label %[[COND_LOOPEXIT]], label %[[SCALAR_PH]]
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; CHECK: [[SCALAR_PH]]:
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; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[COND]] ]
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; CHECK-NEXT: br label %[[LOOP:.*]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
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; CHECK-NEXT: [[FALSE_EXT:%.*]] = zext i1 false to i32
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; CHECK-NEXT: [[XOR:%.*]] = xor i32 [[FALSE_EXT]], [[TRUE_EXT]]
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; CHECK-NEXT: [[XOR_TRUNC:%.*]] = trunc i32 [[XOR]] to i8
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; CHECK-NEXT: store i8 [[XOR_TRUNC]], ptr [[DST]], align 1
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; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV_NEXT]], [[N]]
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; CHECK-NEXT: br i1 [[CMP]], label %[[LOOP]], label %[[COND_LOOPEXIT]], !llvm.loop [[LOOP3:![0-9]+]]
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;
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entry:
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%true.ext = zext i1 true to i32
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br label %cond
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cond:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %cond ], [ %iv.next, %loop ]
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%false.ext = zext i1 false to i32
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%xor = xor i32 %false.ext, %true.ext
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%xor.trunc = trunc i32 %xor to i8
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store i8 %xor.trunc, ptr %dst, align 1
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%iv.next = add i64 %iv, 1
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%cmp = icmp ult i64 %iv.next, %n
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br i1 %cmp, label %loop, label %cond
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}
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