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PGO: Add function to reset counters at runtime 

Adding __llvm_pgo_reset_counters(), which sets all the counters to 0.

<rdar://problem/15943240>

llvm-svn: 204386
This commit is contained in:
Duncan P. N. Exon Smith 2014-03-20 19:44:31 +00:00
parent b9eab6d1c8
commit f1212176ac
4 changed files with 17 additions and 9 deletions
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8
compiler-rt/lib/profile/InstrProfiling.c
View File

@ -8,6 +8,7 @@
\*===----------------------------------------------------------------------===*/
#include "InstrProfiling.h"
#include <string.h>
/* TODO: void __llvm_pgo_get_size_for_buffer(void); */
@ -34,3 +35,10 @@ void __llvm_pgo_write_buffer(FILE *OutputFile) {
I != E; ++I)
writeFunction(OutputFile, I);
}
void __llvm_pgo_reset_counters(void) {
uint64_t *I = __llvm_pgo_counters_begin();
uint64_t *E = __llvm_pgo_counters_end();
memset(I, 0, sizeof(uint64_t)*(E - I));
}

6
compiler-rt/lib/profile/InstrProfiling.h
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@ -37,7 +37,7 @@ typedef struct __llvm_pgo_data {
const uint32_t NumCounters;
const uint64_t FuncHash;
const char *const Name;
const uint64_t *const Counters;
uint64_t *const Counters;
} __llvm_pgo_data;
/* TODO: void __llvm_pgo_get_size_for_buffer(void); */
@ -55,5 +55,5 @@ const __llvm_pgo_data *__llvm_pgo_data_begin();
const __llvm_pgo_data *__llvm_pgo_data_end();
const char *__llvm_pgo_names_begin();
const char *__llvm_pgo_names_end();
const uint64_t *__llvm_pgo_counters_begin();
const uint64_t *__llvm_pgo_counters_end();
uint64_t *__llvm_pgo_counters_begin();
uint64_t *__llvm_pgo_counters_end();

4
compiler-rt/lib/profile/InstrProfilingPlatformDarwin.c
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@ -21,5 +21,5 @@ const __llvm_pgo_data *__llvm_pgo_data_begin() { return &DataStart; }
const __llvm_pgo_data *__llvm_pgo_data_end() { return &DataEnd; }
const char *__llvm_pgo_names_begin() { return &NamesStart; }
const char *__llvm_pgo_names_end() { return &NamesEnd; }
const uint64_t *__llvm_pgo_counters_begin() { return &CountersStart; }
const uint64_t *__llvm_pgo_counters_end() { return &CountersEnd; }
uint64_t *__llvm_pgo_counters_begin() { return &CountersStart; }
uint64_t *__llvm_pgo_counters_end() { return &CountersEnd; }

8
compiler-rt/lib/profile/InstrProfilingPlatformOther.c
View File

@ -13,8 +13,8 @@ static const __llvm_pgo_data *DataFirst = NULL;
static const __llvm_pgo_data *DataLast = NULL;
static const char *NamesFirst = NULL;
static const char *NamesLast = NULL;
static const uint64_t *CountersFirst = NULL;
static const uint64_t *CountersLast = NULL;
static uint64_t *CountersFirst = NULL;
static uint64_t *CountersLast = NULL;
/*!
* \brief Register an instrumented function.
@ -55,5 +55,5 @@ const __llvm_pgo_data *__llvm_pgo_data_begin() { return DataFirst; }
const __llvm_pgo_data *__llvm_pgo_data_end() { return DataLast; }
const char *__llvm_pgo_names_begin() { return NamesFirst; }
const char *__llvm_pgo_names_end() { return NamesLast; }
const uint64_t *__llvm_pgo_counters_begin() { return CountersFirst; }
const uint64_t *__llvm_pgo_counters_end() { return CountersLast; }
uint64_t *__llvm_pgo_counters_begin() { return CountersFirst; }
uint64_t *__llvm_pgo_counters_end() { return CountersLast; }