2de463ece3
Summary:
This is similar to other loop pragmas like 'vectorize'. Currently it
only has state values: distribute(enable) and distribute(disable). When
one of these is specified the corresponding loop metadata is generated:
!{!"llvm.loop.distribute.enable", i1 true/false}
As a result, loop distribution will be attempted on the loop even if
Loop Distribution in not enabled globally. Analogously, with 'disable'
distribution can be turned off for an individual loop even when the pass
is otherwise enabled.
There are some slight differences compared to the existing loop pragmas.
1. There is no 'assume_safety' variant which makes its handling slightly
different from 'vectorize'/'interleave'.
2. Unlike the existing loop pragmas, it does not have a corresponding
numeric pragma like 'vectorize' -> 'vectorize_width'. So for the
consistency checks in CheckForIncompatibleAttributes we don't need to
check it against other pragmas. We just need to check for duplicates of
the same pragma.
Reviewers: rsmith, dexonsmith, aaron.ballman
Subscribers: bob.wilson, cfe-commits, hfinkel
Differential Revision: http://reviews.llvm.org/D19403
llvm-svn: 272656
195 lines
7.7 KiB
C++
195 lines
7.7 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s | FileCheck %s
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// Verify while loop is recognized after sequence of pragma clang loop directives.
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void while_test(int *List, int Length) {
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// CHECK: define {{.*}} @_Z10while_test
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int i = 0;
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#pragma clang loop vectorize(enable)
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#pragma clang loop interleave_count(4)
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#pragma clang loop vectorize_width(4)
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#pragma clang loop unroll(full)
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#pragma clang loop distribute(enable)
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while (i < Length) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_1:.*]]
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List[i] = i * 2;
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i++;
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}
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}
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// Verify do loop is recognized after multi-option pragma clang loop directive.
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void do_test(int *List, int Length) {
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int i = 0;
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#pragma clang loop vectorize_width(8) interleave_count(4) unroll(disable) distribute(disable)
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do {
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// CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_2:.*]]
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List[i] = i * 2;
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i++;
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} while (i < Length);
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}
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enum struct Tuner : short { Interleave = 4, Unroll = 8 };
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// Verify for loop is recognized after sequence of pragma clang loop directives.
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void for_test(int *List, int Length) {
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#pragma clang loop interleave(enable)
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#pragma clang loop interleave_count(static_cast<int>(Tuner::Interleave))
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#pragma clang loop unroll_count(static_cast<int>(Tuner::Unroll))
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for (int i = 0; i < Length; i++) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_3:.*]]
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List[i] = i * 2;
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}
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}
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// Verify c++11 for range loop is recognized after
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// sequence of pragma clang loop directives.
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void for_range_test() {
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double List[100];
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#pragma clang loop vectorize_width(2) interleave_count(2)
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for (int i : List) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_4:.*]]
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List[i] = i;
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}
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}
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// Verify disable pragma clang loop directive generates correct metadata
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void disable_test(int *List, int Length) {
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#pragma clang loop vectorize(disable) unroll(disable) distribute(disable)
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for (int i = 0; i < Length; i++) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_5:.*]]
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List[i] = i * 2;
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}
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}
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#define VECWIDTH 2
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#define INTCOUNT 2
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#define UNROLLCOUNT 8
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// Verify defines are correctly resolved in pragma clang loop directive
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void for_define_test(int *List, int Length, int Value) {
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#pragma clang loop vectorize_width(VECWIDTH) interleave_count(INTCOUNT)
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#pragma clang loop unroll_count(UNROLLCOUNT)
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for (int i = 0; i < Length; i++) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_6:.*]]
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List[i] = i * Value;
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}
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}
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// Verify constant expressions are handled correctly.
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void for_contant_expression_test(int *List, int Length) {
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#pragma clang loop vectorize_width(1 + 4)
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for (int i = 0; i < Length; i++) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_7:.*]]
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List[i] = i;
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}
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#pragma clang loop vectorize_width(3 + VECWIDTH)
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for (int i = 0; i < Length; i++) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_8:.*]]
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List[i] += i;
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}
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}
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// Verify metadata is generated when template is used.
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template <typename A>
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void for_template_test(A *List, int Length, A Value) {
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#pragma clang loop vectorize_width(8) interleave_count(8) unroll_count(8)
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for (int i = 0; i < Length; i++) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_9:.*]]
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List[i] = i * Value;
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}
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}
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// Verify define is resolved correctly when template is used.
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template <typename A, typename T>
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void for_template_define_test(A *List, int Length, A Value) {
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const T VWidth = VECWIDTH;
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const T ICount = INTCOUNT;
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const T UCount = UNROLLCOUNT;
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#pragma clang loop vectorize_width(VWidth) interleave_count(ICount)
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#pragma clang loop unroll_count(UCount)
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for (int i = 0; i < Length; i++) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_10:.*]]
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List[i] = i * Value;
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}
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}
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// Verify templates and constant expressions are handled correctly.
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template <typename A, int V, int I, int U>
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void for_template_constant_expression_test(A *List, int Length) {
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#pragma clang loop vectorize_width(V) interleave_count(I) unroll_count(U)
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for (int i = 0; i < Length; i++) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_11:.*]]
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List[i] = i;
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}
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#pragma clang loop vectorize_width(V * 2 + VECWIDTH) interleave_count(I * 2 + INTCOUNT) unroll_count(U * 2 + UNROLLCOUNT)
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for (int i = 0; i < Length; i++) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_12:.*]]
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List[i] += i;
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}
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const int Scale = 4;
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#pragma clang loop vectorize_width(Scale * V) interleave_count(Scale * I) unroll_count(Scale * U)
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for (int i = 0; i < Length; i++) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_13:.*]]
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List[i] += i;
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}
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#pragma clang loop vectorize_width((Scale * V) + 2)
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for (int i = 0; i < Length; i++) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_14:.*]]
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List[i] += i;
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}
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}
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#undef VECWIDTH
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#undef INTCOUNT
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#undef UNROLLCOUNT
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// Use templates defined above. Test verifies metadata is generated correctly.
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void template_test(double *List, int Length) {
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double Value = 10;
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for_template_test<double>(List, Length, Value);
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for_template_define_test<double, int>(List, Length, Value);
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for_template_constant_expression_test<double, 2, 4, 8>(List, Length);
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}
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// CHECK: ![[LOOP_1]] = distinct !{![[LOOP_1]], ![[WIDTH_4:.*]], ![[INTERLEAVE_4:.*]], ![[INTENABLE_1:.*]], ![[UNROLL_FULL:.*]], ![[DISTRIBUTE_ENABLE:.*]]}
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// CHECK: ![[WIDTH_4]] = !{!"llvm.loop.vectorize.width", i32 4}
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// CHECK: ![[INTERLEAVE_4]] = !{!"llvm.loop.interleave.count", i32 4}
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// CHECK: ![[INTENABLE_1]] = !{!"llvm.loop.vectorize.enable", i1 true}
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// CHECK: ![[UNROLL_FULL]] = !{!"llvm.loop.unroll.full"}
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// CHECK: ![[DISTRIBUTE_ENABLE]] = !{!"llvm.loop.distribute.enable", i1 true}
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// CHECK: ![[LOOP_2]] = distinct !{![[LOOP_2:.*]], ![[WIDTH_8:.*]], ![[INTERLEAVE_4:.*]], ![[UNROLL_DISABLE:.*]], ![[DISTRIBUTE_DISABLE:.*]]}
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// CHECK: ![[WIDTH_8]] = !{!"llvm.loop.vectorize.width", i32 8}
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// CHECK: ![[UNROLL_DISABLE]] = !{!"llvm.loop.unroll.disable"}
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// CHECK: ![[DISTRIBUTE_DISABLE]] = !{!"llvm.loop.distribute.enable", i1 false}
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// CHECK: ![[LOOP_3]] = distinct !{![[LOOP_3]], ![[INTERLEAVE_4:.*]], ![[UNROLL_8:.*]], ![[INTENABLE_1:.*]]}
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// CHECK: ![[UNROLL_8]] = !{!"llvm.loop.unroll.count", i32 8}
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// CHECK: ![[LOOP_4]] = distinct !{![[LOOP_4]], ![[WIDTH_2:.*]], ![[INTERLEAVE_2:.*]]}
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// CHECK: ![[WIDTH_2]] = !{!"llvm.loop.vectorize.width", i32 2}
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// CHECK: ![[INTERLEAVE_2]] = !{!"llvm.loop.interleave.count", i32 2}
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// CHECK: ![[LOOP_5]] = distinct !{![[LOOP_5]], ![[WIDTH_1:.*]], ![[UNROLL_DISABLE:.*]], ![[DISTRIBUTE_DISABLE:.*]]}
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// CHECK: ![[WIDTH_1]] = !{!"llvm.loop.vectorize.width", i32 1}
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// CHECK: ![[LOOP_6]] = distinct !{![[LOOP_6]], ![[WIDTH_2:.*]], ![[INTERLEAVE_2:.*]], ![[UNROLL_8:.*]]}
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// CHECK: ![[LOOP_7]] = distinct !{![[LOOP_7]], ![[WIDTH_5:.*]]}
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// CHECK: ![[WIDTH_5]] = !{!"llvm.loop.vectorize.width", i32 5}
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// CHECK: ![[LOOP_8]] = distinct !{![[LOOP_8]], ![[WIDTH_5:.*]]}
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// CHECK: ![[LOOP_9]] = distinct !{![[LOOP_9]], ![[WIDTH_8:.*]], ![[INTERLEAVE_8:.*]], ![[UNROLL_8:.*]]}
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// CHECK: ![[INTERLEAVE_8]] = !{!"llvm.loop.interleave.count", i32 8}
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// CHECK: ![[LOOP_10]] = distinct !{![[LOOP_10]], ![[WIDTH_2:.*]], ![[INTERLEAVE_2:.*]], ![[UNROLL_8:.*]]}
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// CHECK: ![[LOOP_11]] = distinct !{![[LOOP_11]], ![[WIDTH_2:.*]], ![[INTERLEAVE_4:.*]], ![[UNROLL_8:.*]]}
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// CHECK: ![[LOOP_12]] = distinct !{![[LOOP_12]], ![[WIDTH_6:.*]], ![[INTERLEAVE_10:.*]], ![[UNROLL_24:.*]]}
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// CHECK: ![[WIDTH_6]] = !{!"llvm.loop.vectorize.width", i32 6}
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// CHECK: ![[INTERLEAVE_10]] = !{!"llvm.loop.interleave.count", i32 10}
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// CHECK: ![[UNROLL_24]] = !{!"llvm.loop.unroll.count", i32 24}
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// CHECK: ![[LOOP_13]] = distinct !{![[LOOP_13]], ![[WIDTH_8:.*]], ![[INTERLEAVE_16:.*]], ![[UNROLL_32:.*]]}
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// CHECK: ![[INTERLEAVE_16]] = !{!"llvm.loop.interleave.count", i32 16}
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// CHECK: ![[UNROLL_32]] = !{!"llvm.loop.unroll.count", i32 32}
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// CHECK: ![[LOOP_14]] = distinct !{![[LOOP_14]], ![[WIDTH_10:.*]]}
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// CHECK: ![[WIDTH_10]] = !{!"llvm.loop.vectorize.width", i32 10}
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