[llvm] r347991 - [RISCV] Add additional CSR instruction aliases (imm. operands)

[Alex Bradbury via llvm-commits]

Author: asb
Date: Fri Nov 30 06:10:52 2018
New Revision: 347991

URL: http://llvm.org/viewvc/llvm-project?rev=347991&view=rev
Log:
[RISCV] Add additional CSR instruction aliases (imm. operands)

This patch adds CSR instructions aliases for the cases where the instruction 
takes an immediate operand but the alias doesn't have the i suffix. This is 
necessary for gas/gcc compatibility.

gas doesn't do a similar conversion for fsflags or fsrm, so this should be 
complete.

Differential Revision: https://reviews.llvm.org/D55008
Patch by Luís Marques.


Modified:
    llvm/trunk/lib/Target/RISCV/RISCVInstrInfo.td
    llvm/trunk/test/MC/RISCV/rvi-aliases-valid.s

Modified: llvm/trunk/lib/Target/RISCV/RISCVInstrInfo.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/RISCV/RISCVInstrInfo.td?rev=347991&r1=347990&r2=347991&view=diff
==============================================================================
--- llvm/trunk/lib/Target/RISCV/RISCVInstrInfo.td (original)
+++ llvm/trunk/lib/Target/RISCV/RISCVInstrInfo.td Fri Nov 30 06:10:52 2018
@@ -580,6 +580,16 @@ def : InstAlias<"csrwi $csr, $imm", (CSR
 def : InstAlias<"csrsi $csr, $imm", (CSRRSI X0, csr_sysreg:$csr, uimm5:$imm)>;
 def : InstAlias<"csrci $csr, $imm", (CSRRCI X0, csr_sysreg:$csr, uimm5:$imm)>;
 
+let EmitPriority = 0 in {
+def : InstAlias<"csrw $csr, $imm", (CSRRWI X0, csr_sysreg:$csr, uimm5:$imm)>;
+def : InstAlias<"csrs $csr, $imm", (CSRRSI X0, csr_sysreg:$csr, uimm5:$imm)>;
+def : InstAlias<"csrc $csr, $imm", (CSRRCI X0, csr_sysreg:$csr, uimm5:$imm)>;
+
+def : InstAlias<"csrrw $rd, $csr, $imm", (CSRRWI GPR:$rd, csr_sysreg:$csr, uimm5:$imm)>;
+def : InstAlias<"csrrs $rd, $csr, $imm", (CSRRSI GPR:$rd, csr_sysreg:$csr, uimm5:$imm)>;
+def : InstAlias<"csrrc $rd, $csr, $imm", (CSRRCI GPR:$rd, csr_sysreg:$csr, uimm5:$imm)>;
+}
+
 def : InstAlias<"sfence.vma",     (SFENCE_VMA      X0, X0)>;
 def : InstAlias<"sfence.vma $rs", (SFENCE_VMA GPR:$rs, X0)>;
 

Modified: llvm/trunk/test/MC/RISCV/rvi-aliases-valid.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/RISCV/rvi-aliases-valid.s?rev=347991&r1=347990&r2=347991&view=diff
==============================================================================
--- llvm/trunk/test/MC/RISCV/rvi-aliases-valid.s (original)
+++ llvm/trunk/test/MC/RISCV/rvi-aliases-valid.s Fri Nov 30 06:10:52 2018
@@ -181,6 +181,26 @@ csrsi 0xfff, 0x10
 # CHECK-S-OBJ: csrci sscratch, 17
 csrci 0x140, 0x11
 
+# CHECK-S-OBJ-NOALIAS: csrrwi zero, 336, 7
+# CHECK-S-OBJ: csrwi 336, 7
+csrw 0x150, 7
+# CHECK-S-OBJ-NOALIAS: csrrsi zero, 336, 7
+# CHECK-S-OBJ: csrsi 336, 7
+csrs 0x150, 7
+# CHECK-S-OBJ-NOALIAS: csrrci zero, 336, 7
+# CHECK-S-OBJ: csrci 336, 7
+csrc 0x150, 7
+
+# CHECK-S-OBJ-NOALIAS: csrrwi t0, 336, 15
+# CHECK-S-OBJ: csrrwi t0, 336, 15
+csrrw t0, 0x150, 0xf
+# CHECK-S-OBJ-NOALIAS: csrrsi t0, 4095, 16
+# CHECK-S-OBJ: csrrsi t0, 4095, 16
+csrrs t0, 0xfff, 0x10
+# CHECK-S-OBJ-NOALIAS: csrrci t0, sscratch, 17
+# CHECK-S-OBJ: csrrci t0, sscratch, 17
+csrrc t0, 0x140, 0x11
+
 # CHECK-S-OBJ-NOALIAS: sfence.vma zero, zero
 # CHECK-S-OBJ: sfence.vma
 sfence.vma