54c020d372
When ‘#pragma clang loop vectorize(assume_safety)’ was specified on a loop other loop hints were lost. The problem is that CGLoopInfo attaches metadata differently than EmitCondBrHints in CGStmt. For do-loops CGLoopInfo attaches metadata to the br in the body block and for while and for loops, the inc block. EmitCondBrHints on the other hand always attaches data to the br in the cond block. When specifying assume_safety CGLoopInfo emits an empty llvm.loop metadata shadowing the metadata in the cond block. Loop transformations like rotate and unswitch would then eliminate the cond block and its non-empty metadata. This patch unifies both approaches for adding metadata and modifies the existing safety tests to include non-assume_safety loop hints. llvm-svn: 243315
192 lines
7.4 KiB
C++
192 lines
7.4 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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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)
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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)
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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:.*]]}
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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: ![[LOOP_2]] = distinct !{![[LOOP_2:.*]], ![[WIDTH_8:.*]], ![[INTERLEAVE_4:.*]], ![[UNROLL_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: ![[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:.*]]}
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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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