MIPS: Fixes for patch sites if long branches are emitted.

src/mips/macro-assembler-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1545 matching lines @@
 }
 
 
 void MacroAssembler::Branch(Label* L, Condition cond, Register rs,
                             const Operand& rt,
                             BranchDelaySlot bdslot) {
   if (L->is_bound()) {
     if (is_near(L)) {
       BranchShort(L, cond, rs, rt, bdslot);
     } else {
-      Label skip;
-      Condition neg_cond = NegateCondition(cond);
-      BranchShort(&skip, neg_cond, rs, rt);
-      Jr(L, bdslot);
-      bind(&skip);
+      if (cond != cc_always) {
+        Label skip;
+        Condition neg_cond = NegateCondition(cond);
+        BranchShort(&skip, neg_cond, rs, rt);
+        Jr(L, bdslot);
+        bind(&skip);
+      } else {
+        Jr(L, bdslot);
+      }
     }
   } else {
     if (is_trampoline_emitted()) {
-      Label skip;
-      Condition neg_cond = NegateCondition(cond);
-      BranchShort(&skip, neg_cond, rs, rt);
-      Jr(L, bdslot);
-      bind(&skip);
+      if (cond != cc_always) {
+        Label skip;
+        Condition neg_cond = NegateCondition(cond);
+        BranchShort(&skip, neg_cond, rs, rt);
+        Jr(L, bdslot);
+        bind(&skip);
+      } else {
+        Jr(L, bdslot);
+      }
     } else {
       BranchShort(L, cond, rs, rt, bdslot);
     }
   }
 }
 
 
 void MacroAssembler::Branch(Label* L,
                             Condition cond,
                             Register rs,
@@ skipping 4154 matching lines @@
        opcode == BGTZL);
   opcode = (cond == eq) ? BEQ : BNE;
   instr = (instr & ~kOpcodeMask) | opcode;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS