[llvm] [RISCV] Add Commutable flag to XNOR. (PR #147654)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-risc-v

Author: Craig Topper (topperc)

<details>
<summary>Changes</summary>



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Full diff: https://github.com/llvm/llvm-project/pull/147654.diff


1 Files Affected:

- (modified) llvm/lib/Target/RISCV/RISCVInstrInfoZb.td (+1-1) 


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diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoZb.td b/llvm/lib/Target/RISCV/RISCVInstrInfoZb.td
index 4806bcc1d63de..0db9f00b16162 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoZb.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoZb.td
@@ -272,7 +272,7 @@ def ANDN  : ALU_rr<0b0100000, 0b111, "andn">,
             Sched<[WriteIALU, ReadIALU, ReadIALU]>;
 def ORN   : ALU_rr<0b0100000, 0b110, "orn">,
             Sched<[WriteIALU, ReadIALU, ReadIALU]>;
-def XNOR  : ALU_rr<0b0100000, 0b100, "xnor">,
+def XNOR  : ALU_rr<0b0100000, 0b100, "xnor", Commutable=1>,
             Sched<[WriteIALU, ReadIALU, ReadIALU]>;
 } // Predicates = [HasStdExtZbbOrZbkb]
 

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</details>


https://github.com/llvm/llvm-project/pull/147654