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Merge branch 'JDK-8134940' of https://github.com/theRealAph/jdk into JDK-8134940

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This commit is contained in:
Andrew Haley 2026-07-16 13:35:44 +01:00
commit d22bacc2a8
2 changed files with 22 additions and 2 deletions
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1
src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp
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@ -1481,7 +1481,6 @@ void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
__ load_klass(recv, value, tmp_load_klass);
type_profile_helper(mdo, md, data, recv, Rtmp1);
} else {
__ testptr(value, value);
__ jcc(Assembler::equal, done);
}

23
src/hotspot/cpu/x86/c1_MacroAssembler_x86.cpp
View File

@ -272,10 +272,17 @@ void C1_MacroAssembler::step_random(Register state, Register temp) {
// One of these will be the best for a particular CPU.
if (VM_Version::supports_sse4_2()) {
#ifndef PRODUCT
Label not_zero;
orl(r_profile_rng, r_profile_rng);
jcc(Assembler::notZero, not_zero);
stop("non-zero required before step");
bind(not_zero);
#endif
/* CRC used as a pseudo-random-number generator */
// In effect, the CRC instruction is being used here for its
// linear feedback shift register.
movl(temp, 0);
xorl(temp, temp);
crc32(state, temp, /*sizeInBytes*/2);
} else {
/* LCG by Marsaglia. From Karl Entacher,
@ -288,6 +295,13 @@ void C1_MacroAssembler::step_random(Register state, Register temp) {
void C1_MacroAssembler::save_profile_rng() {
if (ProfileCaptureRatio > 1) {
#ifndef PRODUCT
Label not_zero;
orl(r_profile_rng, r_profile_rng);
jcc(Assembler::notZero, not_zero);
stop("non-zero required before save");
bind(not_zero);
#endif
movl(Address(r15_thread, JavaThread::profile_rng_offset()), r_profile_rng);
}
}
@ -295,6 +309,13 @@ void C1_MacroAssembler::save_profile_rng() {
void C1_MacroAssembler::restore_profile_rng() {
if (ProfileCaptureRatio > 1) {
movl(r_profile_rng, Address(r15_thread, JavaThread::profile_rng_offset()));
#ifndef PRODUCT
Label not_zero;
orl(r_profile_rng, r_profile_rng);
jcc(Assembler::notZero, not_zero);
stop("non-zero required after restore");
bind(not_zero);
#endif
}
}