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a48f58c97f
This adds a new vectorize predication loop hint: #pragma clang loop vectorize_predicate(enable) that can be used to indicate to the vectoriser that all (load/store) instructions should be predicated (masked). This allows, for example, folding of the remainder loop into the main loop. This patch will be followed up with D64916 and D65197. The former is a refactoring in the loopvectorizer and the groundwork to make tail loop folding a more general concept, and in the latter the actual tail loop folding transformation will be implemented. Differential Revision: https://reviews.llvm.org/D64744 llvm-svn: 366989
79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
// RUN: %clang_cc1 -std=c++11 -verify %s
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// Note that this puts the expected lines before the directives to work around
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// limitations in the -verify mode.
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void test(int *List, int Length, int Value) {
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int i = 0;
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#pragma unroll_and_jam
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for (int i = 0; i < Length; i++) {
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for (int j = 0; j < Length; j++) {
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List[i * Length + j] = Value;
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}
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}
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#pragma nounroll_and_jam
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for (int i = 0; i < Length; i++) {
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for (int j = 0; j < Length; j++) {
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List[i * Length + j] = Value;
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}
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}
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#pragma unroll_and_jam 4
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for (int i = 0; i < Length; i++) {
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for (int j = 0; j < Length; j++) {
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List[i * Length + j] = Value;
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}
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}
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/* expected-error {{expected ')'}} */ #pragma unroll_and_jam(4
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/* expected-error {{missing argument; expected an integer value}} */ #pragma unroll_and_jam()
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/* expected-warning {{extra tokens at end of '#pragma unroll_and_jam'}} */ #pragma unroll_and_jam 1 2
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for (int i = 0; i < Length; i++) {
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for (int j = 0; j < Length; j++) {
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List[i * Length + j] = Value;
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}
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}
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/* expected-warning {{extra tokens at end of '#pragma nounroll_and_jam'}} */ #pragma nounroll_and_jam 1
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for (int i = 0; i < Length; i++) {
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for (int j = 0; j < Length; j++) {
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List[i * Length + j] = Value;
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}
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}
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#pragma unroll_and_jam
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/* expected-error {{expected a for, while, or do-while loop to follow '#pragma unroll_and_jam'}} */ int j = Length;
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#pragma unroll_and_jam 4
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/* expected-error {{expected a for, while, or do-while loop to follow '#pragma unroll_and_jam'}} */ int k = Length;
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#pragma nounroll_and_jam
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/* expected-error {{expected a for, while, or do-while loop to follow '#pragma nounroll_and_jam'}} */ int l = Length;
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#pragma unroll_and_jam 4
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/* expected-error {{incompatible directives '#pragma nounroll_and_jam' and '#pragma unroll_and_jam(4)'}} */ #pragma nounroll_and_jam
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for (int i = 0; i < Length; i++) {
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for (int j = 0; j < Length; j++) {
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List[i * Length + j] = Value;
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}
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}
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#pragma nounroll_and_jam
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#pragma unroll(4)
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for (int i = 0; i < Length; i++) {
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for (int j = 0; j < Length; j++) {
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List[i * Length + j] = Value;
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}
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}
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// pragma clang unroll_and_jam is disabled for the moment
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/* expected-error {{invalid option 'unroll_and_jam'; expected vectorize, vectorize_width, interleave, interleave_count, unroll, unroll_count, pipeline, pipeline_initiation_interval, vectorize_predicate, or distribute}} */ #pragma clang loop unroll_and_jam(4)
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for (int i = 0; i < Length; i++) {
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for (int j = 0; j < Length; j++) {
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List[i * Length + j] = Value;
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}
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}
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#pragma unroll_and_jam
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/* expected-error {{expected statement}} */ }
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