implement __builtin_return_addr(0) on ppc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44700 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCMachineFunctionInfo.h b/lib/Target/PowerPC/PPCMachineFunctionInfo.h
index bf1fea2..f6d7089 100644
--- a/lib/Target/PowerPC/PPCMachineFunctionInfo.h
+++ b/lib/Target/PowerPC/PPCMachineFunctionInfo.h
@@ -27,18 +27,29 @@
/// when using frame pointers (dyna_add, dyna_sub.)
int FramePointerSaveIndex;
- /// UsesLR - Indicates whether LR is used in the current function.
+ /// ReturnAddrSaveIndex - Frame index of where the return address is stored.
///
+ int ReturnAddrSaveIndex;
+
+ /// UsesLR - Indicates whether LR is used in the current function. This is
+ /// only valid after the initial scan of the function by PEI.
bool UsesLR;
+ /// LRStoreRequired - The bool indicates whether there is some explicit use of
+ /// the LR/LR8 stack slot that is not obvious from scanning the code. This
+ /// requires that the code generator produce a store of LR to the stack on
+ /// entry, even though LR may otherwise apparently not be used.
+ bool LRStoreRequired;
public:
- PPCFunctionInfo(MachineFunction& MF)
- : FramePointerSaveIndex(0)
- {}
+ PPCFunctionInfo(MachineFunction &MF)
+ : FramePointerSaveIndex(0), ReturnAddrSaveIndex(0), LRStoreRequired(false){}
int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
+ int getReturnAddrSaveIndex() const { return ReturnAddrSaveIndex; }
+ void setReturnAddrSaveIndex(int idx) { ReturnAddrSaveIndex = idx; }
+
/// UsesLR - This is set when the prolog/epilog inserter does its initial scan
/// of the function, it is true if the LR/LR8 register is ever explicitly
/// accessed/clobbered in the machine function (e.g. by calls and movpctolr,
@@ -46,6 +57,9 @@
void setUsesLR(bool U) { UsesLR = U; }
bool usesLR() const { return UsesLR; }
+ void setLRStoreRequired() { LRStoreRequired = true; }
+ bool isLRStoreRequired() const { return LRStoreRequired; }
+
};
} // end of namespace llvm