Implement ADJCALLSTACKUP and ADJCALLSTACKDOWN
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167107 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/Mips16InstrInfo.cpp b/lib/Target/Mips/Mips16InstrInfo.cpp
index fa0876a..619646b 100644
--- a/lib/Target/Mips/Mips16InstrInfo.cpp
+++ b/lib/Target/Mips/Mips16InstrInfo.cpp
@@ -26,7 +26,7 @@
Mips16InstrInfo::Mips16InstrInfo(MipsTargetMachine &tm)
: MipsInstrInfo(tm, Mips::BimmX16),
- RI(*tm.getSubtargetImpl()) {}
+ RI(*tm.getSubtargetImpl(), *this) {}
const MipsRegisterInfo &Mips16InstrInfo::getRegisterInfo() const {
return RI;
@@ -160,6 +160,22 @@
return 0;
}
+/// Adjust SP by Amount bytes.
+void Mips16InstrInfo::adjustStackPtr(unsigned SP, int64_t Amount,
+ MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I) const {
+ DebugLoc DL = I != MBB.end() ? I->getDebugLoc() : DebugLoc();
+ if (isInt<16>(Amount)) {
+ if (Amount < 0)
+ BuildMI(MBB, I, DL, get(Mips::SaveDecSpF16)). addImm(-Amount);
+ else if (Amount > 0)
+ BuildMI(MBB, I, DL, get(Mips::RestoreIncSpF16)).addImm(Amount);
+ }
+ else
+ // not implemented for large values yet
+ assert(false && "adjust stack pointer amount exceeded");
+}
+
unsigned Mips16InstrInfo::GetAnalyzableBrOpc(unsigned Opc) const {
return (Opc == Mips::BeqzRxImmX16 || Opc == Mips::BimmX16 ||
Opc == Mips::BnezRxImmX16 || Opc == Mips::BteqzX16 ||