Sameer AbuAsal 70926d1510 [RISCV] Tail calls don't need to save return address ... Summary: When expanding the PseudoTail in expandFunctionCall() we were using X6 to save the return address. Since this is a tail call the return address is not needed, this patch replaces it with X0 to be ignored. This matches the behaviour listed in the ISA V2.2 document page 110. tail offset -----> jalr x0, x6, offset GCC exhibits the same behavior. Reviewers: apazos, asb, mgrang Reviewed By: asb Subscribers: rbar, johnrusso, simoncook, niosHD, kito-cheng, shiva0217, zzheng, edward-jones, rogfer01 Differential Revision: https://reviews.llvm.org/D48343 llvm-svn: 335239		2018-06-21 14:37:09 +00:00
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AsmParser	[RISCV] AsmParser support for the li pseudo instruction	2018-06-07 15:35:47 +00:00
Disassembler	Rename DEBUG macro to LLVM_DEBUG.	2018-05-14 12:53:11 +00:00
InstPrinter	[RISCV] Tablegen-driven Instruction Compression.	2018-04-06 21:07:05 +00:00
MCTargetDesc	[RISCV] Tail calls don't need to save return address	2018-06-21 14:37:09 +00:00
TargetInfo	Fix RISCV build after r318352	2017-11-16 18:39:31 +00:00
CMakeLists.txt	[RISCV] Tablegen-driven Instruction Compression.	2018-04-06 21:07:05 +00:00
LLVMBuild.txt	[RISCV] Initial codegen support for ALU operations	2017-10-19 21:37:38 +00:00
RISCV.h	[RISCV] Codegen support for memory operations on global addresses	2017-11-08 13:24:21 +00:00
RISCV.td	[RISCV] Define FeatureRelax and shouldForceRelocation for RISCV linker relaxation	2018-05-15 01:28:50 +00:00
RISCVAsmPrinter.cpp	Revert "[RISCV] implement li pseudo instruction"	2018-04-18 19:02:31 +00:00
RISCVCallingConv.td	[RISCV] Add custom CC_RISCV calling convention and improved call support	2017-12-11 12:49:02 +00:00
RISCVFrameLowering.cpp	[RISCV] Preserve stack space for outgoing arguments when the function contain variable size objects	2018-03-20 01:39:17 +00:00
RISCVFrameLowering.h	[RISCV] Preserve stack space for outgoing arguments when the function contain variable size objects	2018-03-20 01:39:17 +00:00
RISCVInstrFormats.td	[RISCV] AsmParser support for the li pseudo instruction	2018-06-07 15:35:47 +00:00
RISCVInstrFormatsC.td	[RISCV] MC layer support for the remaining RVC instructions	2017-12-13 09:32:55 +00:00
RISCVInstrInfo.cpp	[RISCV] Lower the tail pseudoinstruction	2018-05-23 22:44:08 +00:00
RISCVInstrInfo.h	[RISCV] Implement isLoadFromStackSlot and isStoreToStackSlot	2018-04-26 15:34:27 +00:00
RISCVInstrInfo.td	[RISCV] Add InstAlias definitions for sgt and sgtu	2018-06-20 12:54:02 +00:00
RISCVInstrInfoA.td	[RISCV] Add codegen support for atomic load/stores with RV32A	2018-06-13 12:04:51 +00:00
RISCVInstrInfoC.td	[RISCV] Add c.mv rs1, rs2 pattern for addi rs1, rs2, 0	2018-04-12 19:22:40 +00:00
RISCVInstrInfoD.td	[RISCV] Add InstAlias definitions for fgt.{s|d}, fge.{s|d}	2018-06-20 14:03:02 +00:00
RISCVInstrInfoF.td	[RISCV] Accept fmv.s.x and fmv.x.s as mnemonic aliases for fmv.w.x and fmv.x.w	2018-06-20 18:42:25 +00:00
RISCVInstrInfoM.td	[RISCV] Codegen support for the standard RV32M instruction set extension	2018-01-18 12:36:38 +00:00
RISCVISelDAGToDAG.cpp	[RISCV] Add peepholes for Global Address lowering patterns	2018-05-29 19:34:54 +00:00
RISCVISelLowering.cpp	[RISCV] Add codegen support for atomic load/stores with RV32A	2018-06-13 12:04:51 +00:00
RISCVISelLowering.h	[RISCV] Add codegen support for atomic load/stores with RV32A	2018-06-13 12:04:51 +00:00
RISCVMachineFunctionInfo.h	[RISCV] Codegen support for RV32D floating point load/store, fadd.d, calling conv	2018-04-12 05:34:25 +00:00
RISCVMCInstLower.cpp	[RISCV] Add codegen for RV32F floating point load/store	2018-03-20 13:26:12 +00:00
RISCVRegisterInfo.cpp	[RISCV] Set isReMaterializable on ADDI and LUI instructions	2018-05-17 15:51:37 +00:00
RISCVRegisterInfo.h	[RISCV] Set isReMaterializable on ADDI and LUI instructions	2018-05-17 15:51:37 +00:00
RISCVRegisterInfo.td	[RISCV] Lower the tail pseudoinstruction	2018-05-23 22:44:08 +00:00
RISCVSubtarget.cpp	[RISCV] Initial codegen support for ALU operations	2017-10-19 21:37:38 +00:00
RISCVSubtarget.h	[RISCV] Define FeatureRelax and shouldForceRelocation for RISCV linker relaxation	2018-05-15 01:28:50 +00:00
RISCVTargetMachine.cpp	[RISCV] Codegen support for atomic operations on RV32I	2018-06-13 11:58:46 +00:00
RISCVTargetMachine.h	[RISCV] Initial codegen support for ALU operations	2017-10-19 21:37:38 +00:00
RISCVTargetObjectFile.cpp	[RISCV] Use init_array instead of ctors for RISCV target, by default	2018-03-24 18:37:19 +00:00
RISCVTargetObjectFile.h	[RISCV] Use init_array instead of ctors for RISCV target, by default	2018-03-24 18:37:19 +00:00