Optimize suspend checks in optimizing compiler.
- Remove the ones added during graph build (they were added
for the baseline code generator).
- Emit them at loop back edges after phi moves, so that the test
can directly jump to the loop header.
- Fix x86 and x86_64 suspend check by using cmpw instead of cmpl.
Change-Id: I6fad5795a55705d86c9e1cb85bf5d63dadfafa2a
diff --git a/compiler/utils/x86/assembler_x86.cc b/compiler/utils/x86/assembler_x86.cc
index 2c9bc28..f888d46 100644
--- a/compiler/utils/x86/assembler_x86.cc
+++ b/compiler/utils/x86/assembler_x86.cc
@@ -746,6 +746,7 @@
EmitRegisterOperand(dst, src);
}
+
void X86Assembler::xchgl(Register reg, const Address& address) {
AssemblerBuffer::EnsureCapacity ensured(&buffer_);
EmitUint8(0x87);
@@ -753,6 +754,13 @@
}
+void X86Assembler::cmpw(const Address& address, const Immediate& imm) {
+ AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+ EmitUint8(0x66);
+ EmitComplex(7, address, imm);
+}
+
+
void X86Assembler::cmpl(Register reg, const Immediate& imm) {
AssemblerBuffer::EnsureCapacity ensured(&buffer_);
EmitComplex(7, Operand(reg), imm);
diff --git a/compiler/utils/x86/assembler_x86.h b/compiler/utils/x86/assembler_x86.h
index 5c4e34f..ec983d9 100644
--- a/compiler/utils/x86/assembler_x86.h
+++ b/compiler/utils/x86/assembler_x86.h
@@ -337,6 +337,8 @@
void xchgl(Register dst, Register src);
void xchgl(Register reg, const Address& address);
+ void cmpw(const Address& address, const Immediate& imm);
+
void cmpl(Register reg, const Immediate& imm);
void cmpl(Register reg0, Register reg1);
void cmpl(Register reg, const Address& address);