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[Profile] Fix value profiler eviction bug

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Differential Revision: https://reviews.llvm.org/D27224

llvm-svn: 288204
This commit is contained in:
Xinliang David Li 2016-11-29 22:00:54 +00:00
parent 843dfccdc5
commit 8b19a0a100
2 changed files with 48 additions and 1 deletions
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2
compiler-rt/lib/profile/InstrProfilingValue.c
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@ -192,7 +192,7 @@ __llvm_profile_instrument_target(uint64_t TargetValue, void *Data,
* the runtime can wipe out more than one lowest count entries
* to give space for hot targets.
*/
if (!(--MinCountVNode->Count)) {
if (!MinCountVNode->Count || !(--MinCountVNode->Count)) {
CurVNode = MinCountVNode;
CurVNode->Value = TargetValue;
CurVNode->Count++;

47
compiler-rt/test/profile/instrprof-value-prof-reset.c Normal file
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@ -0,0 +1,47 @@
// RUN: %clang_profgen -O2 -mllvm -enable-value-profiling=true -mllvm -vp-static-alloc=true -mllvm -vp-counters-per-site=3 -o %t %s
// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
// RUN: llvm-profdata merge -o %t.profdata %t.profraw
// RUN: llvm-profdata show --all-functions -ic-targets %t.profdata | FileCheck %s
// IR level instrumentation
// RUN: %clang_pgogen -O2 -mllvm -disable-vp=false -mllvm -vp-static-alloc=true -mllvm -vp-counters-per-site=3 -o %t.ir %s
// RUN: env LLVM_PROFILE_FILE=%t.ir.profraw %run %t.ir
// RUN: llvm-profdata merge -o %t.ir.profdata %t.ir.profraw
// RUN: llvm-profdata show --all-functions -ic-targets %t.ir.profdata | FileCheck %s
// IR level instrumentation, dynamic allocation
// RUN: %clang_pgogen -O2 -mllvm -disable-vp=false -mllvm -vp-static-alloc=false -o %t.ir.dyn %s
// RUN: env LLVM_PROFILE_FILE=%t.ir.dyn.profraw %run %t.ir.dyn
// RUN: llvm-profdata merge -o %t.ir.dyn.profdata %t.ir.dyn.profraw
// RUN: llvm-profdata show --all-functions -ic-targets %t.ir.dyn.profdata | FileCheck %s
void callee_0() {}
void callee_1() {}
void callee_2() {}
void *CalleeAddrs[] = {callee_0, callee_1, callee_2, callee_2, callee_2};
extern void lprofSetMaxValsPerSite(unsigned);
extern void __llvm_profile_reset_counters();
typedef void (*FPT)(void);
// Testing value profiling eviction algorithm.
FPT getCalleeFunc(int I) { return CalleeAddrs[I]; }
int main() {
int I;
// First fill up two value profile entries with two targets
lprofSetMaxValsPerSite(2);
for (I = 0; I < 5; I++) {
if (I == 2) {
__llvm_profile_reset_counters();
}
// CHECK: callee_2, 3
// CHECK-NEXT: callee_1, 0
// CHECK-NOT: callee_0,
FPT FP = getCalleeFunc(I);
FP();
}
}