[x86] Avoid memory form of PUSH/CALL for ATOM.

src/ia32/assembler-ia32.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 74 matching lines @@
   CHECK(cpu.has_sse2());  // SSE2 support is mandatory.
   CHECK(cpu.has_cmov());  // CMOV support is mandatory.
 
   // Only use statically determined features for cross compile (snapshot).
   if (cross_compile) return;
 
   if (cpu.has_sse41() && FLAG_enable_sse4_1) supported_ |= 1u << SSE4_1;
   if (cpu.has_sse3() && FLAG_enable_sse3) supported_ |= 1u << SSE3;
   if (cpu.has_avx() && EnableAVX()) supported_ |= 1u << AVX;
   if (cpu.has_fma3() && FLAG_enable_fma3) supported_ |= 1u << FMA3;
+  if (strcmp(FLAG_mcpu, "auto") == 0) {
+    if (cpu.is_atom()) supported_ |= 1u << ATOM;
+  } else if (strcmp(FLAG_mcpu, "atom") == 0) {
+    supported_ |= 1u << ATOM;
+  }
 }
 
 
 void CpuFeatures::PrintTarget() { }
 void CpuFeatures::PrintFeatures() {
-  printf("SSE3=%d SSE4_1=%d AVX=%d FMA3=%d\n", CpuFeatures::IsSupported(SSE3),
-         CpuFeatures::IsSupported(SSE4_1), CpuFeatures::IsSupported(AVX),
-         CpuFeatures::IsSupported(FMA3));
+  printf("SSE3=%d SSE4_1=%d AVX=%d FMA3=%d ATOM=%d\n",
+         CpuFeatures::IsSupported(SSE3), CpuFeatures::IsSupported(SSE4_1),
+         CpuFeatures::IsSupported(AVX), CpuFeatures::IsSupported(FMA3),
+         CpuFeatures::IsSupported(ATOM));
 }
 
 
 // -----------------------------------------------------------------------------
 // Implementation of Displacement
 
 void Displacement::init(Label* L, Type type) {
   DCHECK(!L->is_bound());
   int next = 0;
   if (L->is_linked()) {
@@ skipping 2662 matching lines @@
     fprintf(coverage_log, "%s\n", file_line);
     fflush(coverage_log);
   }
 }
 
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32