Subzero. Enable Atomics in ARM.
BUG= https://code.google.com/p/nativeclient/issues/detail?id=4076
R=stichnot@chromium.org
Review URL: https://codereview.chromium.org/1369333003 .
diff --git a/src/IceTargetLoweringARM32.h b/src/IceTargetLoweringARM32.h
index 8e2081a..c8b3c64 100644
--- a/src/IceTargetLoweringARM32.h
+++ b/src/IceTargetLoweringARM32.h
@@ -131,6 +131,8 @@
void lowerExtractElement(const InstExtractElement *Inst) override;
void lowerFcmp(const InstFcmp *Inst) override;
void lowerIcmp(const InstIcmp *Inst) override;
+ void lowerAtomicRMW(Variable *Dest, uint32_t Operation, Operand *Ptr,
+ Operand *Val);
void lowerIntrinsicCall(const InstIntrinsicCall *Inst) override;
void lowerInsertElement(const InstInsertElement *Inst) override;
void lowerLoad(const InstLoad *Inst) override;
@@ -160,6 +162,7 @@
Variable *legalizeToReg(Operand *From, int32_t RegNum = Variable::NoRegister);
OperandARM32Mem *formMemoryOperand(Operand *Ptr, Type Ty);
+ Variable64On32 *makeI64RegPair();
Variable *makeReg(Type Ty, int32_t RegNum = Variable::NoRegister);
static Type stackSlotType();
Variable *copyToReg(Operand *Src, int32_t RegNum = Variable::NoRegister);
@@ -299,6 +302,7 @@
Context.insert(InstFakeDef::create(Func, Instr->getDestHi()));
}
}
+
void _mov_redefined(Variable *Dest, Operand *Src0,
CondARM32::Cond Pred = CondARM32::AL) {
auto *Instr = InstARM32Mov::create(Func, Dest, Src0, Pred);
@@ -385,11 +389,17 @@
}
void _strex(Variable *Dest, Variable *Value, OperandARM32Mem *Addr,
CondARM32::Cond Pred = CondARM32::AL) {
+ // strex requires Dest to be a register other than Value or Addr. This
+ // restriction is cleanly represented by adding an "early" definition of
+ // Dest (or a latter use of all the sources.)
+ Context.insert(InstFakeDef::create(Func, Dest));
if (auto *Value64 = llvm::dyn_cast<Variable64On32>(Value)) {
Context.insert(InstFakeUse::create(Func, Value64->getLo()));
Context.insert(InstFakeUse::create(Func, Value64->getHi()));
}
- Context.insert(InstARM32Strex::create(Func, Dest, Value, Addr, Pred));
+ auto *Instr = InstARM32Strex::create(Func, Dest, Value, Addr, Pred);
+ Context.insert(Instr);
+ Instr->setDestRedefined();
}
void _sub(Variable *Dest, Variable *Src0, Operand *Src1,
CondARM32::Cond Pred = CondARM32::AL) {
