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#76471 caused buildbot failures on Windows. For more details, see #77546. This PR revises the test and relands #76471.
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/*===---- instr_prof_interface.h - Instrumentation PGO User Program API ----=== | ||
* | ||
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||
* See https://llvm.org/LICENSE.txt for license information. | ||
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
* | ||
*===-----------------------------------------------------------------------=== | ||
* | ||
* This header provides a public interface for fine-grained control of counter | ||
* reset and profile dumping. These interface functions can be directly called | ||
* in user programs. | ||
* | ||
\*===---------------------------------------------------------------------===*/ | ||
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#ifndef COMPILER_RT_INSTR_PROFILING | ||
#define COMPILER_RT_INSTR_PROFILING | ||
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#ifdef __cplusplus | ||
extern "C" { | ||
#endif | ||
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#ifdef __LLVM_INSTR_PROFILE_GENERATE | ||
// Profile file reset and dump interfaces. | ||
// When `-fprofile[-instr]-generate`/`-fcs-profile-generate` is in effect, | ||
// clang defines __LLVM_INSTR_PROFILE_GENERATE to pick up the API calls. | ||
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/*! | ||
* \brief Set the filename for writing instrumentation data. | ||
* | ||
* Sets the filename to be used for subsequent calls to | ||
* \a __llvm_profile_write_file(). | ||
* | ||
* \c Name is not copied, so it must remain valid. Passing NULL resets the | ||
* filename logic to the default behaviour. | ||
* | ||
* Note: There may be multiple copies of the profile runtime (one for each | ||
* instrumented image/DSO). This API only modifies the filename within the | ||
* copy of the runtime available to the calling image. | ||
* | ||
* Warning: This is a no-op if continuous mode (\ref | ||
* __llvm_profile_is_continuous_mode_enabled) is on. The reason for this is | ||
* that in continuous mode, profile counters are mmap()'d to the profile at | ||
* program initialization time. Support for transferring the mmap'd profile | ||
* counts to a new file has not been implemented. | ||
*/ | ||
void __llvm_profile_set_filename(const char *Name); | ||
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/*! | ||
* \brief Interface to set all PGO counters to zero for the current process. | ||
* | ||
*/ | ||
void __llvm_profile_reset_counters(void); | ||
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/*! | ||
* \brief this is a wrapper interface to \c __llvm_profile_write_file. | ||
* After this interface is invoked, an already dumped flag will be set | ||
* so that profile won't be dumped again during program exit. | ||
* Invocation of interface __llvm_profile_reset_counters will clear | ||
* the flag. This interface is designed to be used to collect profile | ||
* data from user selected hot regions. The use model is | ||
* __llvm_profile_reset_counters(); | ||
* ... hot region 1 | ||
* __llvm_profile_dump(); | ||
* .. some other code | ||
* __llvm_profile_reset_counters(); | ||
* ... hot region 2 | ||
* __llvm_profile_dump(); | ||
* | ||
* It is expected that on-line profile merging is on with \c %m specifier | ||
* used in profile filename . If merging is not turned on, user is expected | ||
* to invoke __llvm_profile_set_filename to specify different profile names | ||
* for different regions before dumping to avoid profile write clobbering. | ||
*/ | ||
int __llvm_profile_dump(void); | ||
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// Interface to dump the current process' order file to disk. | ||
int __llvm_orderfile_dump(void); | ||
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#else | ||
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#define __llvm_profile_set_filename(Name) | ||
#define __llvm_profile_reset_counters() | ||
#define __llvm_profile_dump() (0) | ||
#define __llvm_orderfile_dump() (0) | ||
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#endif | ||
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#ifdef __cplusplus | ||
} // extern "C" | ||
#endif | ||
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#endif |
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