Make FlushICache NOP for Nvidia Denver CPU's.

src/arm/assembler-arm.cc

Index: src/arm/assembler-arm.cc
diff --git a/src/arm/assembler-arm.cc b/src/arm/assembler-arm.cc
index 8fadb7606c8f0c8203d443ab9e1eb0622eb527b6..0cb4628fe681ffe4e213642d9221a736ec85435c 100644
--- a/src/arm/assembler-arm.cc
+++ b/src/arm/assembler-arm.cc
@@ -127,6 +127,11 @@ void CpuFeatures::ProbeImpl(bool cross_compile) {
   }
 
   if (FLAG_enable_32dregs && cpu.has_vfp3_d32()) supported_ |= 1u << VFP32DREGS;
+
+  if (cpu.implementer() == base::CPU::NVIDIA &&
+      cpu.variant() == base::CPU::NV_VARIANT_DENVER) {
+    supported_ |= 1u << COHERENT_CACHE;
+  }
 #endif
 
   DCHECK(!IsSupported(VFP3) || IsSupported(ARMv7));
@@ -188,14 +193,15 @@ void CpuFeatures::PrintTarget() {
 void CpuFeatures::PrintFeatures() {
   printf(
     "ARMv7=%d VFP3=%d VFP32DREGS=%d NEON=%d SUDIV=%d UNALIGNED_ACCESSES=%d "
-    "MOVW_MOVT_IMMEDIATE_LOADS=%d",
+    "MOVW_MOVT_IMMEDIATE_LOADS=%d COHERENT_CACHE=%d",
     CpuFeatures::IsSupported(ARMv7),
     CpuFeatures::IsSupported(VFP3),
     CpuFeatures::IsSupported(VFP32DREGS),
     CpuFeatures::IsSupported(NEON),
     CpuFeatures::IsSupported(SUDIV),
     CpuFeatures::IsSupported(UNALIGNED_ACCESSES),
-    CpuFeatures::IsSupported(MOVW_MOVT_IMMEDIATE_LOADS));
+    CpuFeatures::IsSupported(MOVW_MOVT_IMMEDIATE_LOADS),
+    CpuFeatures::IsSupported(COHERENT_CACHE));
 #ifdef __arm__
   bool eabi_hardfloat = base::OS::ArmUsingHardFloat();
 #elif USE_EABI_HARDFLOAT