ac73b73c16
Since C++11, the C++ standard has a forward progress guarantee [intro.progress], so all such functions must have the `mustprogress` requirement. In addition, from C11 and onwards, loops without a non-zero constant conditional or no conditional are also required to make progress (C11 6.8.5p6). This patch implements these attribute deductions so they can be used by the optimization passes. Differential Revision: https://reviews.llvm.org/D86841
42 lines
2.7 KiB
C++
42 lines
2.7 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s | FileCheck %s
|
|
|
|
extern "C" void followup_outer(int n, int *x) {
|
|
#pragma clang loop pipeline_initiation_interval(10)
|
|
#pragma clang loop unroll_count(4)
|
|
#pragma unroll_and_jam
|
|
#pragma clang loop vectorize(assume_safety)
|
|
#pragma clang loop distribute(enable)
|
|
for(int j = 0; j < n; j++) {
|
|
x[j] = 10;
|
|
}
|
|
}
|
|
|
|
|
|
// CHECK-LABEL: define void @followup_outer
|
|
// CHECK: br label %for.cond, !llvm.loop ![[LOOP_3:[0-9]+]]
|
|
|
|
// CHECK-DAG: ![[ACCESSGROUP_2:[0-9]+]] = distinct !{}
|
|
|
|
// CHECK-DAG: ![[LOOP_3:[0-9]+]] = distinct !{![[LOOP_3:[0-9]+]], [[MP:![0-9]+]], ![[PARALLEL_ACCESSES_4:[0-9]+]], ![[DISTRIBUTE_5:[0-9]+]], ![[DISTRIBUTE_FOLLOWUP_6:[0-9]+]]}
|
|
// CHECK-DAG: ![[PARALLEL_ACCESSES_4:[0-9]+]] = !{!"llvm.loop.parallel_accesses", ![[ACCESSGROUP_2]]}
|
|
// CHECK-DAG: ![[DISTRIBUTE_5:[0-9]+]] = !{!"llvm.loop.distribute.enable", i1 true}
|
|
// CHECK-DAG: ![[DISTRIBUTE_FOLLOWUP_6:[0-9]+]] = !{!"llvm.loop.distribute.followup_all", ![[LOOP_7:[0-9]+]]}
|
|
|
|
// CHECK-DAG: ![[LOOP_7:[0-9]+]] = distinct !{![[LOOP_7:[0-9]+]], [[MP]], ![[PARALLEL_ACCESSES_4:[0-9]+]], ![[VECTORIZE_8:[0-9]+]], ![[VECTORIZE_FOLLOWUP_9:[0-9]+]]}
|
|
// CHECK-DAG: ![[VECTORIZE_8:[0-9]+]] = !{!"llvm.loop.vectorize.enable", i1 true}
|
|
// CHECK-DAG: ![[VECTORIZE_FOLLOWUP_9:[0-9]+]] = !{!"llvm.loop.vectorize.followup_all", ![[LOOP_10:[0-9]+]]}
|
|
|
|
// CHECK-DAG: ![[LOOP_10:[0-9]+]] = distinct !{![[LOOP_10:[0-9]+]], [[MP]], ![[PARALLEL_ACCESSES_4:[0-9]+]], ![[ISVECTORIZED_11:[0-9]+]], ![[UNROLLANDJAM_12:[0-9]+]], ![[UNROLLANDJAM_FOLLOWUPOUTER_13:[0-9]+]]}
|
|
// CHECK-DAG: ![[ISVECTORIZED_11:[0-9]+]] = !{!"llvm.loop.isvectorized"}
|
|
// CHECK-DAG: ![[UNROLLANDJAM_12:[0-9]+]] = !{!"llvm.loop.unroll_and_jam.enable"}
|
|
// CHECK-DAG: ![[UNROLLANDJAM_FOLLOWUPOUTER_13:[0-9]+]] = !{!"llvm.loop.unroll_and_jam.followup_outer", ![[LOOP_14:[0-9]+]]}
|
|
|
|
// CHECK-DAG: ![[LOOP_14:[0-9]+]] = distinct !{![[LOOP_14:[0-9]+]], [[MP]], ![[PARALLEL_ACCESSES_4:[0-9]+]], ![[ISVECTORIZED_11:[0-9]+]], ![[UNROLLANDJAM_DISABLE_15:[0-9]+]], ![[UNROLL_COUNT_16:[0-9]+]], ![[UNROLL_FOLLOWUP_17:[0-9]+]]}
|
|
// CHECK-DAG: ![[UNROLLANDJAM_DISABLE_15:[0-9]+]] = !{!"llvm.loop.unroll_and_jam.disable"}
|
|
// CHECK-DAG: ![[UNROLL_COUNT_16:[0-9]+]] = !{!"llvm.loop.unroll.count", i32 4}
|
|
// CHECK-DAG: ![[UNROLL_FOLLOWUP_17:[0-9]+]] = !{!"llvm.loop.unroll.followup_all", ![[LOOP_18:[0-9]+]]}
|
|
|
|
// CHECK-DAG: ![[LOOP_18:[0-9]+]] = distinct !{![[LOOP_18:[0-9]+]], [[MP]], ![[PARALLEL_ACCESSES_4:[0-9]+]], ![[ISVECTORIZED_11:[0-9]+]], ![[UNROLLANDJAM_DISABLE_15:[0-9]+]], ![[UNROLL_DISABLE_19:[0-9]+]], ![[INITIATIONINTERVAL_20:[0-9]+]]}
|
|
// CHECK-DAG: ![[UNROLL_DISABLE_19:[0-9]+]] = !{!"llvm.loop.unroll.disable"}
|
|
// CHECK-DAG: ![[INITIATIONINTERVAL_20:[0-9]+]] = !{!"llvm.loop.pipeline.initiationinterval", i32 10}
|