[polly] r303722 - Header file to help forcibly link GPURuntime
Tobias Grosser via llvm-commits
llvm-commits at lists.llvm.org
Tue May 23 23:46:04 PDT 2017
Author: grosser
Date: Wed May 24 01:46:03 2017
New Revision: 303722
URL: http://llvm.org/viewvc/llvm-project?rev=303722&view=rev
Log:
Header file to help forcibly link GPURuntime
Summary: LinkGPURuntime.h defines and creates a structure ForceGPURuntimeLinking which creates an artificial dependency to functions defined in GPUJIT.c. The presence of this structure ensures that these functions are a part of the compiled object/library files including it.
Reviewers: grosser, Meinersbur
Reviewed By: grosser
Subscribers: #polly, pollydev
Tags: #polly
Differential Revision: https://reviews.llvm.org/D33198
Added:
polly/trunk/include/polly/Support/LinkGPURuntime.h
Added: polly/trunk/include/polly/Support/LinkGPURuntime.h
URL: http://llvm.org/viewvc/llvm-project/polly/trunk/include/polly/Support/LinkGPURuntime.h?rev=303722&view=auto
==============================================================================
--- polly/trunk/include/polly/Support/LinkGPURuntime.h (added)
+++ polly/trunk/include/polly/Support/LinkGPURuntime.h Wed May 24 01:46:03 2017
@@ -0,0 +1,43 @@
+//===- Support/LinkGPURuntime.h -- Headerfile to help force-link GPURuntime =//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This header helps pull in libGPURuntime.so
+//
+//===----------------------------------------------------------------------===//
+#ifndef POLLY_LINK_GPURUNTIME
+#define POLLY_LINK_GPURUNTIME
+
+extern "C" {
+#include "GPURuntime/GPUJIT.h"
+}
+
+namespace polly {
+struct ForceGPURuntimeLinking {
+ ForceGPURuntimeLinking() {
+ if (std::getenv("bar") != (char *)-1)
+ return;
+ // We must reference GPURuntime in such a way that compilers will not
+ // delete it all as dead code, even with whole program optimization,
+ // yet is effectively a NO-OP. As the compiler isn't smart enough
+ // to know that getenv() never returns -1, this will do the job.
+ polly_initContextCL();
+ polly_initContextCUDA();
+ polly_getKernel(nullptr, nullptr);
+ polly_freeKernel(nullptr);
+ polly_copyFromHostToDevice(nullptr, nullptr, 0);
+ polly_copyFromDeviceToHost(nullptr, nullptr, 0);
+ polly_synchronizeDevice();
+ polly_launchKernel(nullptr, 0, 0, 0, 0, 0, nullptr);
+ polly_freeDeviceMemory(nullptr);
+ polly_freeContext(nullptr);
+ polly_synchronizeDevice();
+ }
+} structure;
+} // namespace polly
+#endif
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