[RISCV][NFC] Change naming scheme for RISC-V specific DAG nodes

Previously we had names like 'Call' or 'Tail'. This potentially clashes with
the naming scheme used elsewhere in RISCVInstrInfo.td. Many other backends
would use names like AArch64call or PPCtail. I prefer the SystemZ approach,
which uses prefixed all-lowercase names. This matches the naming scheme used
for target-independent SelectionDAG nodes.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351823 91177308-0d34-0410-b5e6-96231b3b80d8

Author: asb

lib/Target/RISCV/RISCVInstrInfo.td

@@ -16,36 +16,41 @@ include "RISCVInstrFormats.td"
 // RISC-V specific DAG Nodes.
 //===----------------------------------------------------------------------===//
 
-def SDT_RISCVCall         : SDTypeProfile<0, -1, [SDTCisVT<0, XLenVT>]>;
-def SDT_RISCVCallSeqStart : SDCallSeqStart<[SDTCisVT<0, i32>,
-                                            SDTCisVT<1, i32>]>;
-def SDT_RISCVCallSeqEnd   : SDCallSeqEnd<[SDTCisVT<0, i32>,
-                                          SDTCisVT<1, i32>]>;
-def SDT_RISCVSelectCC     : SDTypeProfile<1, 5, [SDTCisSameAs<1, 2>,
-                                                 SDTCisSameAs<0, 4>,
-                                                 SDTCisSameAs<4, 5>]>;
-
-
-def Call         : SDNode<"RISCVISD::CALL", SDT_RISCVCall,
-                          [SDNPHasChain, SDNPOptInGlue, SDNPOutGlue,
-                           SDNPVariadic]>;
-def CallSeqStart : SDNode<"ISD::CALLSEQ_START", SDT_RISCVCallSeqStart,
-                          [SDNPHasChain, SDNPOutGlue]>;
-def CallSeqEnd   : SDNode<"ISD::CALLSEQ_END", SDT_RISCVCallSeqEnd,
-                          [SDNPHasChain, SDNPOptInGlue, SDNPOutGlue]>;
-def RetFlag      : SDNode<"RISCVISD::RET_FLAG", SDTNone,
-                          [SDNPHasChain, SDNPOptInGlue, SDNPVariadic]>;
-def URetFlag     : SDNode<"RISCVISD::URET_FLAG", SDTNone,
-                          [SDNPHasChain, SDNPOptInGlue]>;
-def SRetFlag     : SDNode<"RISCVISD::SRET_FLAG", SDTNone,
-                          [SDNPHasChain, SDNPOptInGlue]>;
-def MRetFlag     : SDNode<"RISCVISD::MRET_FLAG", SDTNone,
-                          [SDNPHasChain, SDNPOptInGlue]>;
-def SelectCC     : SDNode<"RISCVISD::SELECT_CC", SDT_RISCVSelectCC,
-                          [SDNPInGlue]>;
-def Tail         : SDNode<"RISCVISD::TAIL", SDT_RISCVCall,
-                          [SDNPHasChain, SDNPOptInGlue, SDNPOutGlue,
-                           SDNPVariadic]>;
+// Target-independent type requirements, but with target-specific formats.
+def SDT_CallSeqStart : SDCallSeqStart<[SDTCisVT<0, i32>,
+                                       SDTCisVT<1, i32>]>;
+def SDT_CallSeqEnd   : SDCallSeqEnd<[SDTCisVT<0, i32>,
+                                     SDTCisVT<1, i32>]>;
+
+// Target-dependent type requirements.
+def SDT_RISCVCall     : SDTypeProfile<0, -1, [SDTCisVT<0, XLenVT>]>;
+def SDT_RISCVSelectCC : SDTypeProfile<1, 5, [SDTCisSameAs<1, 2>,
+                                             SDTCisSameAs<0, 4>,
+                                             SDTCisSameAs<4, 5>]>;
+
+// Target-independent nodes, but with target-specific formats.
+def callseq_start : SDNode<"ISD::CALLSEQ_START", SDT_CallSeqStart,
+                           [SDNPHasChain, SDNPOutGlue]>;
+def callseq_end   : SDNode<"ISD::CALLSEQ_END", SDT_CallSeqEnd,
+                           [SDNPHasChain, SDNPOptInGlue, SDNPOutGlue]>;
+
+// Target-dependent nodes.
+def riscv_call      : SDNode<"RISCVISD::CALL", SDT_RISCVCall,
+                             [SDNPHasChain, SDNPOptInGlue, SDNPOutGlue,
+                              SDNPVariadic]>;
+def riscv_ret_flag  : SDNode<"RISCVISD::RET_FLAG", SDTNone,
+                             [SDNPHasChain, SDNPOptInGlue, SDNPVariadic]>;
+def riscv_uret_flag : SDNode<"RISCVISD::URET_FLAG", SDTNone,
+                             [SDNPHasChain, SDNPOptInGlue]>;
+def riscv_sret_flag : SDNode<"RISCVISD::SRET_FLAG", SDTNone,
+                             [SDNPHasChain, SDNPOptInGlue]>;
+def riscv_mret_flag : SDNode<"RISCVISD::MRET_FLAG", SDTNone,
+                             [SDNPHasChain, SDNPOptInGlue]>;
+def riscv_selectcc  : SDNode<"RISCVISD::SELECT_CC", SDT_RISCVSelectCC,
+                             [SDNPInGlue]>;
+def riscv_tail      : SDNode<"RISCVISD::TAIL", SDT_RISCVCall,
+                             [SDNPHasChain, SDNPOptInGlue, SDNPOutGlue,
+                              SDNPVariadic]>;
 
 //===----------------------------------------------------------------------===//
 // Operand and SDNode transformation definitions.
@@ -745,7 +750,7 @@ class SelectCC_rrirr<RegisterClass valty, RegisterClass cmpty>
     : Pseudo<(outs valty:$dst),
              (ins cmpty:$lhs, cmpty:$rhs, ixlenimm:$imm,
               valty:$truev, valty:$falsev),
-             [(set valty:$dst, (SelectCC cmpty:$lhs, cmpty:$rhs,
+             [(set valty:$dst, (riscv_selectcc cmpty:$lhs, cmpty:$rhs,
               (XLenVT imm:$imm), valty:$truev, valty:$falsev))]>;
 
 def Select_GPR_Using_CC_GPR : SelectCC_rrirr<GPR, GPR>;
@@ -801,22 +806,23 @@ def : Pat<(brind (add GPR:$rs1, simm12:$imm12)),
 // Define isCodeGenOnly = 0 to support parsing assembly "call" instruction.
 let isCall = 1, Defs = [X1], isCodeGenOnly = 0 in
 def PseudoCALL : Pseudo<(outs), (ins bare_symbol:$func),
-                        [(Call tglobaladdr:$func)]> {
+                        [(riscv_call tglobaladdr:$func)]> {
   let AsmString = "call\t$func";
 }
 
-def : Pat<(Call texternalsym:$func), (PseudoCALL texternalsym:$func)>;
+def : Pat<(riscv_call texternalsym:$func), (PseudoCALL texternalsym:$func)>;
 
-def : Pat<(URetFlag), (URET X0, X0)>;
-def : Pat<(SRetFlag), (SRET X0, X0)>;
-def : Pat<(MRetFlag), (MRET X0, X0)>;
+def : Pat<(riscv_uret_flag), (URET X0, X0)>;
+def : Pat<(riscv_sret_flag), (SRET X0, X0)>;
+def : Pat<(riscv_mret_flag), (MRET X0, X0)>;
 
 let isCall = 1, Defs = [X1] in
-def PseudoCALLIndirect : Pseudo<(outs), (ins GPR:$rs1), [(Call GPR:$rs1)]>,
+def PseudoCALLIndirect : Pseudo<(outs), (ins GPR:$rs1),
+                                [(riscv_call GPR:$rs1)]>,
                          PseudoInstExpansion<(JALR X1, GPR:$rs1, 0)>;
 
 let isBarrier = 1, isReturn = 1, isTerminator = 1 in
-def PseudoRET : Pseudo<(outs), (ins), [(RetFlag)]>,
+def PseudoRET : Pseudo<(outs), (ins), [(riscv_ret_flag)]>,
                 PseudoInstExpansion<(JALR X0, X1, 0)>;
 
 // PseudoTAIL is a pseudo instruction similar to PseudoCALL and will eventually
@@ -829,12 +835,13 @@ def PseudoTAIL : Pseudo<(outs), (ins bare_symbol:$dst), []> {
 }
 
 let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1, Uses = [X2] in
-def PseudoTAILIndirect : Pseudo<(outs), (ins GPRTC:$rs1), [(Tail GPRTC:$rs1)]>,
+def PseudoTAILIndirect : Pseudo<(outs), (ins GPRTC:$rs1),
+                                [(riscv_tail GPRTC:$rs1)]>,
                          PseudoInstExpansion<(JALR X0, GPR:$rs1, 0)>;
 
-def : Pat<(Tail (iPTR tglobaladdr:$dst)),
+def : Pat<(riscv_tail (iPTR tglobaladdr:$dst)),
           (PseudoTAIL texternalsym:$dst)>;
-def : Pat<(Tail (iPTR texternalsym:$dst)),
+def : Pat<(riscv_tail (iPTR texternalsym:$dst)),
           (PseudoTAIL texternalsym:$dst)>;
 
 let hasSideEffects = 0, mayLoad = 0, mayStore = 0, isCodeGenOnly = 0,
@@ -905,9 +912,9 @@ def : Pat<(atomic_fence (XLenVT 7), (imm)), (FENCE 0b11, 0b11)>;
 // Pessimistically assume the stack pointer will be clobbered
 let Defs = [X2], Uses = [X2] in {
 def ADJCALLSTACKDOWN : Pseudo<(outs), (ins i32imm:$amt1, i32imm:$amt2),
-                              [(CallSeqStart timm:$amt1, timm:$amt2)]>;
+                              [(callseq_start timm:$amt1, timm:$amt2)]>;
 def ADJCALLSTACKUP   : Pseudo<(outs), (ins i32imm:$amt1, i32imm:$amt2),
-                              [(CallSeqEnd timm:$amt1, timm:$amt2)]>;
+                              [(callseq_end timm:$amt1, timm:$amt2)]>;
 } // Defs = [X2], Uses = [X2]
 
 /// RV64 patterns