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author | Akira Hatanaka <ahatanaka@mips.com> | 2012-10-26 23:56:38 +0000 |
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committer | Akira Hatanaka <ahatanaka@mips.com> | 2012-10-26 23:56:38 +0000 |
commit | 7887c90a7b80b994a51a2a3b88eef3643473e67c (patch) | |
tree | c2a7b940f1036a9eb941f5dc6574e2556cac3a9b /lib/Target/Mips/MipsISelLowering.h | |
parent | 3649255e14e369aa70bf1122cd5b0e1a92431662 (diff) | |
download | llvm-7887c90a7b80b994a51a2a3b88eef3643473e67c.tar.gz llvm-7887c90a7b80b994a51a2a3b88eef3643473e67c.tar.bz2 llvm-7887c90a7b80b994a51a2a3b88eef3643473e67c.tar.xz |
Add class MipsCC which provides methods used to analyze formal and call
arguments and inquire about calling convention information.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166840 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/Mips/MipsISelLowering.h')
-rw-r--r-- | lib/Target/Mips/MipsISelLowering.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/lib/Target/Mips/MipsISelLowering.h b/lib/Target/Mips/MipsISelLowering.h index b75a513fa7..33ddce9a68 100644 --- a/lib/Target/Mips/MipsISelLowering.h +++ b/lib/Target/Mips/MipsISelLowering.h @@ -17,6 +17,7 @@ #include "Mips.h" #include "MipsSubtarget.h" +#include "llvm/CodeGen/CallingConvLower.h" #include "llvm/CodeGen/SelectionDAG.h" #include "llvm/Target/TargetLowering.h" @@ -171,6 +172,69 @@ namespace llvm { virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const; private: + + /// ByValArgInfo - Byval argument information. + struct ByValArgInfo { + unsigned FirstIdx; // Index of the first register used. + unsigned NumRegs; // Number of registers used for this argument. + unsigned Address; // Offset of the stack area used to pass this argument. + + ByValArgInfo() : FirstIdx(0), NumRegs(0), Address(0) {} + }; + + /// MipsCC - This class provides methods used to analyze formal and call + /// arguments and inquire about calling convention information. + class MipsCC { + public: + MipsCC(CallingConv::ID CallConv, bool IsVarArg, bool IsO32, + CCState &Info); + + void analyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs); + void analyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins); + void handleByValArg(unsigned ValNo, MVT ValVT, MVT LocVT, + CCValAssign::LocInfo LocInfo, + ISD::ArgFlagsTy ArgFlags); + + const CCState &getCCInfo() const { return CCInfo; } + + /// hasByValArg - Returns true if function has byval arguments. + bool hasByValArg() const { return !ByValArgs.empty(); } + + /// useRegsForByval - Returns true if the calling convention allows the + /// use of registers to pass byval arguments. + bool useRegsForByval() const { return UseRegsForByval; } + + /// regSize - Size (in number of bits) of integer registers. + unsigned regSize() const { return RegSize; } + + /// numIntArgRegs - Number of integer registers available for calls. + unsigned numIntArgRegs() const { return NumIntArgRegs; } + + /// reservedArgArea - The size of the area the caller reserves for + /// register arguments. This is 16-byte if ABI is O32. + unsigned reservedArgArea() const { return ReservedArgArea; } + + /// intArgRegs - Pointer to array of integer registers. + const uint16_t *intArgRegs() const { return IntArgRegs; } + + typedef SmallVector<ByValArgInfo, 2>::const_iterator byval_iterator; + byval_iterator byval_begin() const { return ByValArgs.begin(); } + byval_iterator byval_end() const { return ByValArgs.end(); } + + private: + void allocateRegs(ByValArgInfo &ByVal, unsigned ByValSize, + unsigned Align); + + CCState &CCInfo; + bool UseRegsForByval; + unsigned RegSize; + unsigned NumIntArgRegs; + unsigned ReservedArgArea; + const uint16_t *IntArgRegs, *ShadowRegs; + SmallVector<ByValArgInfo, 2> ByValArgs; + llvm::CCAssignFn *FixedFn, *VarFn; + }; + // Subtarget Info const MipsSubtarget *Subtarget; |