From 99b4cc2b545632cf7b2bee032fa06b2b765a37f0 Mon Sep 17 00:00:00 2001
From: twisti <unknown>
Date: Tue, 25 May 2010 02:38:48 -0700
Subject: [PATCH] 6934104: JSR 292 needs to support SPARC C2 Summary: C2 for
 SPARC needs to support JSR 292. Reviewed-by: kvn, never

---
 src/cpu/sparc/vm/runtime_sparc.cpp      |  7 +++++-
 src/cpu/sparc/vm/sparc.ad               | 32 +++++++++++++++++++++++--
 src/cpu/x86/vm/runtime_x86_32.cpp       |  4 ++--
 src/cpu/x86/vm/sharedRuntime_x86_64.cpp |  2 +-
 src/cpu/x86/vm/x86_32.ad                |  6 ++---
 src/cpu/x86/vm/x86_64.ad                |  6 ++---
 6 files changed, 45 insertions(+), 12 deletions(-)

diff --git a/src/cpu/sparc/vm/runtime_sparc.cpp b/src/cpu/sparc/vm/runtime_sparc.cpp
index 9ae48cb90..4890fe204 100644
--- a/src/cpu/sparc/vm/runtime_sparc.cpp
+++ b/src/cpu/sparc/vm/runtime_sparc.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 1998-2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1998-2010 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -116,6 +116,11 @@ void OptoRuntime::generate_exception_blob() {
   __ mov(O0, G3_scratch);             // Move handler address to temp
   __ restore();
 
+  // Restore SP from L7 if the exception PC is a MethodHandle call site.
+  __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), O7);
+  __ tst(O7);
+  __ movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP);
+
   // G3_scratch contains handler address
   // Since this may be the deopt blob we must set O7 to look like we returned
   // from the original pc that threw the exception
diff --git a/src/cpu/sparc/vm/sparc.ad b/src/cpu/sparc/vm/sparc.ad
index 899101559..f5046f7a6 100644
--- a/src/cpu/sparc/vm/sparc.ad
+++ b/src/cpu/sparc/vm/sparc.ad
@@ -534,7 +534,10 @@ bool can_branch_register( Node *bol, Node *cmp ) {
 //       The "return address" is the address of the call instruction, plus 8.
 
 int MachCallStaticJavaNode::ret_addr_offset() {
-  return NativeCall::instruction_size;  // call; delay slot
+  int offset = NativeCall::instruction_size;  // call; delay slot
+  if (_method_handle_invoke)
+    offset += 4;  // restore SP
+  return offset;
 }
 
 int MachCallDynamicJavaNode::ret_addr_offset() {
@@ -1858,7 +1861,7 @@ RegMask Matcher::modL_proj_mask() {
 }
 
 const RegMask Matcher::method_handle_invoke_SP_save_mask() {
-  return RegMask();
+  return L7_REGP_mask;
 }
 
 %}
@@ -2441,6 +2444,16 @@ encode %{
                     /*preserve_g2=*/true, /*force far call*/true);
   %}
 
+  enc_class preserve_SP %{
+    MacroAssembler _masm(&cbuf);
+    __ mov(SP, L7_mh_SP_save);
+  %}
+
+  enc_class restore_SP %{
+    MacroAssembler _masm(&cbuf);
+    __ mov(L7_mh_SP_save, SP);
+  %}
+
   enc_class Java_Static_Call (method meth) %{    // JAVA STATIC CALL
     // CALL to fixup routine.  Fixup routine uses ScopeDesc info to determine
     // who we intended to call.
@@ -9213,6 +9226,7 @@ instruct safePoint_poll(iRegP poll) %{
 // Call Java Static Instruction
 instruct CallStaticJavaDirect( method meth ) %{
   match(CallStaticJava);
+  predicate(! ((CallStaticJavaNode*)n)->is_method_handle_invoke());
   effect(USE meth);
 
   size(8);
@@ -9223,6 +9237,20 @@ instruct CallStaticJavaDirect( method meth ) %{
   ins_pipe(simple_call);
 %}
 
+// Call Java Static Instruction (method handle version)
+instruct CallStaticJavaHandle(method meth, l7RegP l7_mh_SP_save) %{
+  match(CallStaticJava);
+  predicate(((CallStaticJavaNode*)n)->is_method_handle_invoke());
+  effect(USE meth, KILL l7_mh_SP_save);
+
+  size(8);
+  ins_cost(CALL_COST);
+  format %{ "CALL,static/MethodHandle" %}
+  ins_encode(preserve_SP, Java_Static_Call(meth), restore_SP, call_epilog);
+  ins_pc_relative(1);
+  ins_pipe(simple_call);
+%}
+
 // Call Java Dynamic Instruction
 instruct CallDynamicJavaDirect( method meth ) %{
   match(CallDynamicJava);
diff --git a/src/cpu/x86/vm/runtime_x86_32.cpp b/src/cpu/x86/vm/runtime_x86_32.cpp
index 3c220d7f6..057e0aa53 100644
--- a/src/cpu/x86/vm/runtime_x86_32.cpp
+++ b/src/cpu/x86/vm/runtime_x86_32.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 1998-2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1998-2010 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -117,7 +117,7 @@ void OptoRuntime::generate_exception_blob() {
 
   // Restore SP from BP if the exception PC is a MethodHandle call site.
   __ cmpl(Address(rcx, JavaThread::is_method_handle_return_offset()), 0);
-  __ cmovptr(Assembler::notEqual, rsp, rbp);
+  __ cmovptr(Assembler::notEqual, rsp, rbp_mh_SP_save);
 
   // We have a handler in rax, (could be deopt blob)
   // rdx - throwing pc, deopt blob will need it.
diff --git a/src/cpu/x86/vm/sharedRuntime_x86_64.cpp b/src/cpu/x86/vm/sharedRuntime_x86_64.cpp
index c6a1bd914..95aa6fb76 100644
--- a/src/cpu/x86/vm/sharedRuntime_x86_64.cpp
+++ b/src/cpu/x86/vm/sharedRuntime_x86_64.cpp
@@ -3305,7 +3305,7 @@ void OptoRuntime::generate_exception_blob() {
 
   // Restore SP from BP if the exception PC is a MethodHandle call site.
   __ cmpl(Address(r15_thread, JavaThread::is_method_handle_return_offset()), 0);
-  __ cmovptr(Assembler::notEqual, rsp, rbp);
+  __ cmovptr(Assembler::notEqual, rsp, rbp_mh_SP_save);
 
   // We have a handler in rax (could be deopt blob).
   __ mov(r8, rax);
diff --git a/src/cpu/x86/vm/x86_32.ad b/src/cpu/x86/vm/x86_32.ad
index 9455d15d1..fae5704d9 100644
--- a/src/cpu/x86/vm/x86_32.ad
+++ b/src/cpu/x86/vm/x86_32.ad
@@ -1841,14 +1841,14 @@ encode %{
     MacroAssembler _masm(&cbuf);
     // RBP is preserved across all calls, even compiled calls.
     // Use it to preserve RSP in places where the callee might change the SP.
-    __ movptr(rbp, rsp);
+    __ movptr(rbp_mh_SP_save, rsp);
     debug_only(int off1 = cbuf.code_size());
     assert(off1 - off0 == preserve_SP_size(), "correct size prediction");
   %}
 
   enc_class restore_SP %{
     MacroAssembler _masm(&cbuf);
-    __ movptr(rsp, rbp);
+    __ movptr(rsp, rbp_mh_SP_save);
   %}
 
   enc_class Java_Static_Call (method meth) %{    // JAVA STATIC CALL
@@ -13570,7 +13570,7 @@ instruct CallStaticJavaDirect(method meth) %{
 // Call Java Static Instruction (method handle version)
 // Note: If this code changes, the corresponding ret_addr_offset() and
 //       compute_padding() functions will have to be adjusted.
-instruct CallStaticJavaHandle(method meth, eBPRegP ebp) %{
+instruct CallStaticJavaHandle(method meth, eBPRegP ebp_mh_SP_save) %{
   match(CallStaticJava);
   predicate(((CallStaticJavaNode*)n)->is_method_handle_invoke());
   effect(USE meth);
diff --git a/src/cpu/x86/vm/x86_64.ad b/src/cpu/x86/vm/x86_64.ad
index c5eecc626..60e9d4c2f 100644
--- a/src/cpu/x86/vm/x86_64.ad
+++ b/src/cpu/x86/vm/x86_64.ad
@@ -2635,14 +2635,14 @@ encode %{
     MacroAssembler _masm(&cbuf);
     // RBP is preserved across all calls, even compiled calls.
     // Use it to preserve RSP in places where the callee might change the SP.
-    __ movptr(rbp, rsp);
+    __ movptr(rbp_mh_SP_save, rsp);
     debug_only(int off1 = cbuf.code_size());
     assert(off1 - off0 == preserve_SP_size(), "correct size prediction");
   %}
 
   enc_class restore_SP %{
     MacroAssembler _masm(&cbuf);
-    __ movptr(rsp, rbp);
+    __ movptr(rsp, rbp_mh_SP_save);
   %}
 
   enc_class Java_Static_Call(method meth)
@@ -12604,7 +12604,7 @@ instruct CallStaticJavaDirect(method meth) %{
 // Call Java Static Instruction (method handle version)
 // Note: If this code changes, the corresponding ret_addr_offset() and
 //       compute_padding() functions will have to be adjusted.
-instruct CallStaticJavaHandle(method meth, rbp_RegP rbp) %{
+instruct CallStaticJavaHandle(method meth, rbp_RegP rbp_mh_SP_save) %{
   match(CallStaticJava);
   predicate(((CallStaticJavaNode*) n)->is_method_handle_invoke());
   effect(USE meth);
-- 
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