private:
SDNode *Select(SDOperand N);
- bool MatchAddress(SDOperand N, X86ISelAddressMode &AM, bool isRoot = true);
+ bool MatchAddress(SDOperand N, X86ISelAddressMode &AM,
+ bool isRoot = true, unsigned Depth = 0);
bool SelectAddr(SDOperand Op, SDOperand N, SDOperand &Base,
SDOperand &Scale, SDOperand &Index, SDOperand &Disp);
bool SelectLEAAddr(SDOperand Op, SDOperand N, SDOperand &Base,
/// returning true if it cannot be done. This just pattern matches for the
/// addressing mode
bool X86DAGToDAGISel::MatchAddress(SDOperand N, X86ISelAddressMode &AM,
- bool isRoot) {
+ bool isRoot, unsigned Depth) {
+ if (Depth > 5) {
+ // Default, generate it as a register.
+ AM.BaseType = X86ISelAddressMode::RegBase;
+ AM.Base.Reg = N;
+ return false;
+ }
+
// RIP relative addressing: %rip + 32-bit displacement!
if (AM.isRIPRel) {
if (!AM.ES && AM.JT != -1 && N.getOpcode() == ISD::Constant) {
case ISD::ADD:
if (!Available) {
X86ISelAddressMode Backup = AM;
- if (!MatchAddress(N.Val->getOperand(0), AM, false) &&
- !MatchAddress(N.Val->getOperand(1), AM, false))
+ if (!MatchAddress(N.Val->getOperand(0), AM, false, Depth+1) &&
+ !MatchAddress(N.Val->getOperand(1), AM, false, Depth+1))
return false;
AM = Backup;
- if (!MatchAddress(N.Val->getOperand(1), AM, false) &&
- !MatchAddress(N.Val->getOperand(0), AM, false))
+ if (!MatchAddress(N.Val->getOperand(1), AM, false, Depth+1) &&
+ !MatchAddress(N.Val->getOperand(0), AM, false, Depth+1))
return false;
AM = Backup;
}