Revert "x86/x86-64: Avoid temporary for read barrier field load."

Fault handler does not recognize the instruction
    F6 /0 ib    TEST r/m8, imm8
so we get crashes instead of NPEs.

Bug: 29966877
Bug: 12687968

This reverts commit ccf06d8f19a37432de4a3b768747090adfbd18ec.

Change-Id: Ib7db3b59f44c0d3ed5e24a20b6c6ee596a89d709

1 files changed, 0 insertions, 17 deletions

diff --git a/compiler/utils/x86/assembler_x86.cc b/compiler/utils/x86/assembler_x86.cc
index f2ef41f400..f1a991574b 100644
--- a/compiler/utils/x86/assembler_x86.cc
+++ b/compiler/utils/x86/assembler_x86.cc
@@ -1148,23 +1148,6 @@ void X86Assembler::testl(Register reg, const Immediate& immediate) {
 }
 
 
-void X86Assembler::testb(const Address& dst, const Immediate& imm) {
-  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
-  EmitUint8(0xF6);
-  EmitOperand(EAX, dst);
-  CHECK(imm.is_int8());
-  EmitUint8(imm.value() & 0xFF);
-}
-
-
-void X86Assembler::testl(const Address& dst, const Immediate& imm) {
-  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
-  EmitUint8(0xF7);
-  EmitOperand(0, dst);
-  EmitImmediate(imm);
-}
-
-
 void X86Assembler::andl(Register dst, Register src) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0x23);