8303154: Investigate and improve instruction cache flushing during compilation

Reviewed-by: thartmann, kvn

Author: dafedafe

src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp

@@ -791,7 +791,6 @@ AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm
 
   gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup);
 
-  __ flush();
   return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry, c2i_no_clinit_check_entry);
 }
 

src/hotspot/cpu/arm/sharedRuntime_arm.cpp

@@ -645,7 +645,6 @@ AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm
   address c2i_entry = __ pc();
   gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup);
 
-  __ flush();
   return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry);
 }
 

src/hotspot/cpu/riscv/sharedRuntime_riscv.cpp

@@ -681,7 +681,6 @@ AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm
 
   gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup);
 
-  __ flush();
   return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry, c2i_no_clinit_check_entry);
 }
 

src/hotspot/cpu/x86/sharedRuntime_x86_32.cpp

@@ -968,7 +968,6 @@ AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm
 
   gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup);
 
-  __ flush();
   return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry);
 }
 

src/hotspot/cpu/x86/sharedRuntime_x86_64.cpp

@@ -1041,7 +1041,6 @@ AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm
 
   gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup);
 
-  __ flush();
   return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry, c2i_no_clinit_check_entry);
 }
 

src/hotspot/share/c1/c1_Compilation.cpp

@@ -313,9 +313,6 @@ void Compilation::emit_code_epilog(LIR_Assembler* assembler) {
   // Emit the handler to remove the activation from the stack and
   // dispatch to the caller.
   offsets()->set_value(CodeOffsets::UnwindHandler, assembler->emit_unwind_handler());
-
-  // done
-  masm()->flush();
 }
 
 

src/hotspot/share/code/codeCache.cpp

@@ -628,9 +628,6 @@ void CodeCache::commit(CodeBlob* cb) {
   if (cb->is_adapter_blob()) {
     heap->set_adapter_count(heap->adapter_count() + 1);
   }
-
-  // flush the hardware I-cache
-  ICache::invalidate_range(cb->content_begin(), cb->content_size());
 }
 
 bool CodeCache::contains(void *p) {