[test] Remove superflous FlushICache calls.

MakeAssemblerBufferExecutable now flushes the i-cache, so we do
not need to do that again.

Change-Id: I46f5619167114cdb84064ef363106bee64282d1f
Reviewed-on: https://chromium-review.googlesource.com/1152813Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
Cr-Commit-Position: refs/heads/master@{#54822}

test/cctest/test-assembler-arm64.cc

@@ -199,7 +199,6 @@ static void InitializeVM() {
 
 #define RUN()                                              \
   MakeAssemblerBufferExecutable(buf, allocated);           \
-  Assembler::FlushICache(buf, masm.SizeOfGeneratedCode()); \
   {                                                        \
     void (*test_function)(void);                           \
     memcpy(&test_function, &buf, sizeof(buf));             \

test/cctest/test-code-stubs-arm.cc

@@ -117,7 +117,6 @@ ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
   CodeDesc desc;
   masm.GetCode(isolate, &desc);
   MakeAssemblerBufferExecutable(buffer, allocated);
-  Assembler::FlushICache(buffer, allocated);
   return (reinterpret_cast<ConvertDToIFunc>(
       reinterpret_cast<intptr_t>(buffer)));
 }

test/cctest/test-code-stubs-arm64.cc

@@ -129,7 +129,6 @@ ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
   CodeDesc desc;
   masm.GetCode(isolate, &desc);
   MakeAssemblerBufferExecutable(buffer, allocated);
-  Assembler::FlushICache(buffer, allocated);
   return (reinterpret_cast<ConvertDToIFunc>(
       reinterpret_cast<intptr_t>(buffer)));
 }

test/cctest/test-code-stubs-mips.cc

@@ -130,7 +130,6 @@ ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
   CodeDesc desc;
   masm.GetCode(isolate, &desc);
   MakeAssemblerBufferExecutable(buffer, allocated);
-  Assembler::FlushICache(buffer, allocated);
   return (reinterpret_cast<ConvertDToIFunc>(
       reinterpret_cast<intptr_t>(buffer)));
 }

test/cctest/test-code-stubs-mips64.cc

@@ -127,7 +127,6 @@ ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
   CodeDesc desc;
   masm.GetCode(isolate, &desc);
   MakeAssemblerBufferExecutable(buffer, allocated);
-  Assembler::FlushICache(buffer, allocated);
   return (reinterpret_cast<ConvertDToIFunc>(
       reinterpret_cast<intptr_t>(buffer)));
 }