mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-29 19:36:04 +00:00
76b178d949
Summary:
[OpenCL] Generate 'unroll.enable' metadata for __attribute__((opencl_unroll_hint))
For both !{!"llvm.loop.unroll.enable"} and !{!"llvm.loop.unroll.full"} the unroller
will try to fully unroll a loop unless the trip count is not known at compile time.
In that case for '.full' metadata no unrolling will be processed, while for '.enable'
the loop will be partially unrolled with a heuristically chosen unroll factor.
See: docs/LanguageExtensions.rst
From https://www.khronos.org/registry/OpenCL/sdk/2.0/docs/man/xhtml/attributes-loopUnroll.html
__attribute__((opencl_unroll_hint))
for (int i=0; i<2; i++)
{
...
}
In the example above, the compiler will determine how much to unroll the loop.
Before the patch for __attribute__((opencl_unroll_hint)) was generated metadata
!{!"llvm.loop.unroll.full"}, which limits ability of loop unroller to decide, how
much to unroll the loop.
Reviewers: Anastasia, yaxunl
Reviewed By: Anastasia
Subscribers: zzheng, dmgreen, jdoerfert, cfe-commits, asavonic, AlexeySotkin
Tags: #clang
Differential Revision: https://reviews.llvm.org/D59493
llvm-svn: 356571
98 lines
2.8 KiB
Common Lisp
98 lines
2.8 KiB
Common Lisp
// RUN: %clang_cc1 -emit-llvm -O0 -cl-std=CL2.0 -o - %s | FileCheck %s
|
|
// RUN: %clang_cc1 -emit-llvm -O0 -cl-std=CL1.2 -o - %s | FileCheck %s
|
|
|
|
/*** for ***/
|
|
void for_count()
|
|
{
|
|
// CHECK-LABEL: for_count
|
|
__attribute__((opencl_unroll_hint(8)))
|
|
for( int i = 0; i < 1000; ++i);
|
|
// CHECK: br label %{{.*}}, !llvm.loop ![[FOR_COUNT:.*]]
|
|
}
|
|
|
|
void for_disable()
|
|
{
|
|
// CHECK-LABEL: for_disable
|
|
__attribute__((opencl_unroll_hint(1)))
|
|
for( int i = 0; i < 1000; ++i);
|
|
// CHECK: br label %{{.*}}, !llvm.loop ![[FOR_DISABLE:.*]]
|
|
}
|
|
|
|
void for_enable()
|
|
{
|
|
// CHECK-LABEL: for_enable
|
|
__attribute__((opencl_unroll_hint))
|
|
for( int i = 0; i < 1000; ++i);
|
|
// CHECK: br label %{{.*}}, !llvm.loop ![[FOR_ENABLE:.*]]
|
|
}
|
|
|
|
/*** while ***/
|
|
void while_count()
|
|
{
|
|
// CHECK-LABEL: while_count
|
|
int i = 1000;
|
|
__attribute__((opencl_unroll_hint(8)))
|
|
while(i-->0);
|
|
// CHECK: br label %{{.*}}, !llvm.loop ![[WHILE_COUNT:.*]]
|
|
}
|
|
|
|
void while_disable()
|
|
{
|
|
// CHECK-LABEL: while_disable
|
|
int i = 1000;
|
|
__attribute__((opencl_unroll_hint(1)))
|
|
while(i-->0);
|
|
// CHECK: br label %{{.*}}, !llvm.loop ![[WHILE_DISABLE:.*]]
|
|
}
|
|
|
|
void while_enable()
|
|
{
|
|
// CHECK-LABEL: while_enable
|
|
int i = 1000;
|
|
__attribute__((opencl_unroll_hint))
|
|
while(i-->0);
|
|
// CHECK: br label %{{.*}}, !llvm.loop ![[WHILE_ENABLE:.*]]
|
|
}
|
|
|
|
/*** do ***/
|
|
void do_count()
|
|
{
|
|
// CHECK-LABEL: do_count
|
|
int i = 1000;
|
|
__attribute__((opencl_unroll_hint(8)))
|
|
do {} while(i--> 0);
|
|
// CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !llvm.loop ![[DO_COUNT:.*]]
|
|
}
|
|
|
|
void do_disable()
|
|
{
|
|
// CHECK-LABEL: do_disable
|
|
int i = 1000;
|
|
__attribute__((opencl_unroll_hint(1)))
|
|
do {} while(i--> 0);
|
|
// CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !llvm.loop ![[DO_DISABLE:.*]]
|
|
}
|
|
|
|
void do_enable()
|
|
{
|
|
// CHECK-LABEL: do_enable
|
|
int i = 1000;
|
|
__attribute__((opencl_unroll_hint))
|
|
do {} while(i--> 0);
|
|
// CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !llvm.loop ![[DO_ENABLE:.*]]
|
|
}
|
|
|
|
|
|
// CHECK: ![[FOR_COUNT]] = distinct !{![[FOR_COUNT]], ![[COUNT:.*]]}
|
|
// CHECK: ![[COUNT]] = !{!"llvm.loop.unroll.count", i32 8}
|
|
// CHECK: ![[FOR_DISABLE]] = distinct !{![[FOR_DISABLE]], ![[DISABLE:.*]]}
|
|
// CHECK: ![[DISABLE]] = !{!"llvm.loop.unroll.disable"}
|
|
// CHECK: ![[FOR_ENABLE]] = distinct !{![[FOR_ENABLE]], ![[ENABLE:.*]]}
|
|
// CHECK: ![[ENABLE]] = !{!"llvm.loop.unroll.enable"}
|
|
// CHECK: ![[WHILE_COUNT]] = distinct !{![[WHILE_COUNT]], ![[COUNT]]}
|
|
// CHECK: ![[WHILE_DISABLE]] = distinct !{![[WHILE_DISABLE]], ![[DISABLE]]}
|
|
// CHECK: ![[WHILE_ENABLE]] = distinct !{![[WHILE_ENABLE]], ![[ENABLE]]}
|
|
// CHECK: ![[DO_COUNT]] = distinct !{![[DO_COUNT]], ![[COUNT]]}
|
|
// CHECK: ![[DO_DISABLE]] = distinct !{![[DO_DISABLE]], ![[DISABLE]]}
|
|
// CHECK: ![[DO_ENABLE]] = distinct !{![[DO_ENABLE]], ![[ENABLE]]}
|