[llvm] 1533682 - [RISCV] Simplify MIPS CCMov patterns. NFC (#125318)

[via llvm-commits]

Author: Craig Topper
Date: 2025-02-01T09:36:31-08:00
New Revision: 15336823adbd41d401185c2fecf2c063f6a64f73

URL: https://github.com/llvm/llvm-project/commit/15336823adbd41d401185c2fecf2c063f6a64f73
DIFF: https://github.com/llvm/llvm-project/commit/15336823adbd41d401185c2fecf2c063f6a64f73.diff

LOG: [RISCV] Simplify MIPS CCMov patterns. NFC (#125318)

We have ComplexPatterns that reduce 3 patterns to 1, by handling the
==/!= 0, imm, and register cases. These are used for XTHeadCondMove,
Zicond, XVentanaCondOps, and our basic seteq/setne patterns.

Added: 
    

Modified: 
    llvm/lib/Target/RISCV/RISCVInstrInfoXMips.td

Removed: 
    


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diff  --git a/llvm/lib/Target/RISCV/RISCVInstrInfoXMips.td b/llvm/lib/Target/RISCV/RISCVInstrInfoXMips.td
index f53a887f62d464..9be424310d6600 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoXMips.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoXMips.td
@@ -116,24 +116,13 @@ def MIPS_CCMOV : RVInstR4<0b11, 0b011, OPC_CUSTOM_0, (outs GPR:$rd),
 }
 
 let Predicates = [UseCCMovInsn] in {
-def : Pat<(select (XLenVT (setne (XLenVT GPR:$rs2), (XLenVT 0))),
+def : Pat<(select (riscv_setne (XLenVT GPR:$rs2)),
                   (XLenVT GPR:$rs1), (XLenVT GPR:$rs3)),
           (MIPS_CCMOV GPR:$rs1, GPR:$rs2, GPR:$rs3)>;
-def : Pat<(select (XLenVT (setne (XLenVT GPR:$x), (XLenVT simm12_plus1:$y))),
-                  (XLenVT GPR:$rs1), (XLenVT GPR:$rs3)),
-          (MIPS_CCMOV GPR:$rs1, (ADDI GPR:$x, (NegImm simm12_plus1:$y)), GPR:$rs3)>;
-def : Pat<(select (XLenVT (setne (XLenVT GPR:$x), (XLenVT GPR:$y))),
-                  (XLenVT GPR:$rs1), (XLenVT GPR:$rs3)),
-          (MIPS_CCMOV GPR:$rs1, (XOR GPR:$x, GPR:$y), GPR:$rs3)>;
-def : Pat<(select (XLenVT (seteq (XLenVT GPR:$rs2), (XLenVT 0))),
+def : Pat<(select (riscv_seteq (XLenVT GPR:$rs2)),
                   (XLenVT GPR:$rs3), (XLenVT GPR:$rs1)),
           (MIPS_CCMOV GPR:$rs1, GPR:$rs2, GPR:$rs3)>;
-def : Pat<(select (XLenVT (seteq (XLenVT GPR:$x), (XLenVT simm12_plus1:$y))),
-                  (XLenVT GPR:$rs3), (XLenVT GPR:$rs1)),
-          (MIPS_CCMOV GPR:$rs1, (ADDI GPR:$x, (NegImm simm12_plus1:$y)), GPR:$rs3)>;
-def : Pat<(select (XLenVT (seteq (XLenVT GPR:$x), (XLenVT GPR:$y))),
-                  (XLenVT GPR:$rs3), (XLenVT GPR:$rs1)),
-          (MIPS_CCMOV GPR:$rs1, (XOR GPR:$x, GPR:$y), GPR:$rs3)>;
+
 def : Pat<(select (XLenVT GPR:$rs2), (XLenVT GPR:$rs1), (XLenVT GPR:$rs3)),
           (MIPS_CCMOV GPR:$rs1, GPR:$rs2, GPR:$rs3)>;
 }