Revert Reland "Add a small pattern matcher to JIT compilation."

This reverts commit f221e75a1abbddef0bc319062db9953a44a2ada7.

Reason for revert: still luci failures

Change-Id: I4b3bd97305f6ef3dfd81becbb4fdad3f55e71029

1 files changed, 0 insertions, 14 deletions

diff --git a/compiler/jit/jit_compiler.cc b/compiler/jit/jit_compiler.cc
index aafdfcf22e..e67236769e 100644
--- a/compiler/jit/jit_compiler.cc
+++ b/compiler/jit/jit_compiler.cc
@@ -33,7 +33,6 @@
 #include "jit/jit.h"
 #include "jit/jit_code_cache.h"
 #include "jit/jit_logger.h"
-#include "jit/small_pattern_matcher.h"
 
 namespace art HIDDEN {
 namespace jit {
@@ -182,19 +181,6 @@ bool JitCompiler::CompileMethod(
   DCHECK(!method->IsProxyMethod());
   DCHECK(method->GetDeclaringClass()->IsResolved());
 
-  // Try to pattern match the method. Only on arm and arm64 for now as we have
-  // sufficiently similar calling convention between C++ and managed code.
-  if (kRuntimeISA == InstructionSet::kArm || kRuntimeISA == InstructionSet::kArm64) {
-    if (!GetCompilerOptions().GetDebuggable() && compilation_kind == CompilationKind::kBaseline) {
-      const void* pattern = SmallPatternMatcher::TryMatch(method);
-      if (pattern != nullptr) {
-        VLOG(jit) << "Successfully pattern matched " << method->PrettyMethod();
-        Runtime::Current()->GetInstrumentation()->UpdateMethodsCode(method, pattern);
-        return true;
-      }
-    }
-  }
-
   TimingLogger logger(
       "JIT compiler timing logger", true, VLOG_IS_ON(jit), TimingLogger::TimingKind::kThreadCpu);
   self->AssertNoPendingException();