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8380168: Obsolete unused flag UseNewLongLShift

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Reviewed-by: kvn, stuefe
This commit is contained in:
Ashutosh Mehra 2026-03-23 14:17:11 +00:00
parent 9a0fde4a49
commit c436802bce
3 changed files with 2 additions and 7 deletions
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3
src/hotspot/cpu/x86/globals_x86.hpp
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@ -117,9 +117,6 @@ define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);
product(bool, UseIncDec, true, DIAGNOSTIC, \
"Use INC, DEC instructions on x86") \
\
product(bool, UseNewLongLShift, false, \
"Use optimized bitwise shift left") \
\
product(bool, UseAddressNop, false, \
"Use '0F 1F [addr]' NOP instructions on x86 cpus") \
\

4
src/hotspot/cpu/x86/vm_version_x86.cpp
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@ -1525,10 +1525,6 @@ void VM_Version::get_processor_features() {
// Use it on new AMD cpus starting from Opteron.
UseAddressNop = true;
}
if (supports_sse2() && FLAG_IS_DEFAULT(UseNewLongLShift)) {
// Use it on new AMD cpus starting from Opteron.
UseNewLongLShift = true;
}
if (FLAG_IS_DEFAULT(UseXmmLoadAndClearUpper)) {
if (supports_sse4a()) {
UseXmmLoadAndClearUpper = true; // use movsd only on '10h' Opteron

2
src/hotspot/share/runtime/arguments.cpp
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@ -555,6 +555,8 @@ static SpecialFlag const special_jvm_flags[] = {
{ "NeverActAsServerClassMachine", JDK_Version::jdk(26), JDK_Version::jdk(27), JDK_Version::jdk(28) },
{ "AlwaysActAsServerClassMachine", JDK_Version::jdk(26), JDK_Version::jdk(27), JDK_Version::jdk(28) },
{ "UseXMMForArrayCopy", JDK_Version::undefined(), JDK_Version::jdk(27), JDK_Version::jdk(28) },
{ "UseNewLongLShift", JDK_Version::undefined(), JDK_Version::jdk(27), JDK_Version::jdk(28) },
#ifdef ASSERT
{ "DummyObsoleteTestFlag", JDK_Version::undefined(), JDK_Version::jdk(18), JDK_Version::undefined() },
#endif