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| author | Stephen Lin <stephenwlin@gmail.com> | 2013-04-20 05:14:40 +0000 |
|---|---|---|
| committer | Stephen Lin <stephenwlin@gmail.com> | 2013-04-20 05:14:40 +0000 |
| commit | 456ca048af35163b9f52187e92a23ee0a9f059e8 (patch) | |
| tree | f7b4d4711424b927d5b323a9e4ef4d97742beeb4 /lib/Target/ARM/ARMBaseRegisterInfo.cpp | |
| parent | 5c34e08b9fff9d4df2421e4f41ff15b85f638dd1 (diff) | |
| download | llvm-456ca048af35163b9f52187e92a23ee0a9f059e8.tar.gz llvm-456ca048af35163b9f52187e92a23ee0a9f059e8.tar.bz2 llvm-456ca048af35163b9f52187e92a23ee0a9f059e8.tar.xz | |
Add CodeGen support for functions that always return arguments via a new parameter attribute 'returned', which is taken advantage of in target-independent tail call opportunity detection and in ARM call lowering (when placed on an integral first parameter).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179925 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM/ARMBaseRegisterInfo.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMBaseRegisterInfo.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMBaseRegisterInfo.cpp b/lib/Target/ARM/ARMBaseRegisterInfo.cpp index b6b27f849a..b0d34a76b0 100644 --- a/lib/Target/ARM/ARMBaseRegisterInfo.cpp +++ b/lib/Target/ARM/ARMBaseRegisterInfo.cpp @@ -75,6 +75,12 @@ ARMBaseRegisterInfo::getCallPreservedMask(CallingConv::ID) const { } const uint32_t* +ARMBaseRegisterInfo::getThisReturnPreservedMask(CallingConv::ID) const { + return (STI.isTargetIOS() && !STI.isAAPCS_ABI()) + ? CSR_iOS_ThisReturn_RegMask : CSR_AAPCS_ThisReturn_RegMask; +} + +const uint32_t* ARMBaseRegisterInfo::getNoPreservedMask() const { return CSR_NoRegs_RegMask; } |