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author | Chris Lattner <sabre@nondot.org> | 2007-12-08 06:59:59 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2007-12-08 06:59:59 +0000 |
commit | 3fc027df4fca0355717515abb4d6e3753e6dee2a (patch) | |
tree | 6311d6ce97604a9baa315d5657959d0b87784eb3 /lib/Target/PowerPC/PPCMachineFunctionInfo.h | |
parent | 73944fb22270697e75408cba52cca276be371a1f (diff) | |
download | llvm-3fc027df4fca0355717515abb4d6e3753e6dee2a.tar.gz llvm-3fc027df4fca0355717515abb4d6e3753e6dee2a.tar.bz2 llvm-3fc027df4fca0355717515abb4d6e3753e6dee2a.tar.xz |
implement __builtin_return_addr(0) on ppc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44700 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCMachineFunctionInfo.h')
-rw-r--r-- | lib/Target/PowerPC/PPCMachineFunctionInfo.h | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/lib/Target/PowerPC/PPCMachineFunctionInfo.h b/lib/Target/PowerPC/PPCMachineFunctionInfo.h index bf1fea211b..f6d70899aa 100644 --- a/lib/Target/PowerPC/PPCMachineFunctionInfo.h +++ b/lib/Target/PowerPC/PPCMachineFunctionInfo.h @@ -27,18 +27,29 @@ private: /// 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 @@ public: void setUsesLR(bool U) { UsesLR = U; } bool usesLR() const { return UsesLR; } + void setLRStoreRequired() { LRStoreRequired = true; } + bool isLRStoreRequired() const { return LRStoreRequired; } + }; } // end of namespace llvm |