[llvm] 4dad168 - [NFC][AArch64] SME2 Add instruction name convention and fix LookupTable number of registers

[Caroline Concatto via llvm-commits]

Author: Caroline Concatto
Date: 2022-11-15T12:09:51Z
New Revision: 4dad168e672c43656127f1a7a2e9642ebd0285a8

URL: https://github.com/llvm/llvm-project/commit/4dad168e672c43656127f1a7a2e9642ebd0285a8
DIFF: https://github.com/llvm/llvm-project/commit/4dad168e672c43656127f1a7a2e9642ebd0285a8.diff

LOG: [NFC][AArch64] SME2 Add instruction name convention and fix LookupTable number of registers

This patch adds the name convention for SME instructions.
This patch fixes the number of registers for LookUpTable in the AsmParser.
The number of registers is not used atm, but it is needed.
The switch case in getNumRegsForRegKind needs to have all the
RegKind enum.

Added: 
    

Modified: 
    llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
    llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td b/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
index b1c7ea841b0d8..468db595e1b2b 100644
--- a/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
@@ -25,6 +25,18 @@ def AArch64_restore_za : SDNode<"AArch64ISD::RESTORE_ZA", SDTypeProfile<0, 3,
 
 def AArch64ObscureCopy : SDNode<"AArch64ISD::OBSCURE_COPY", SDTypeProfile<1, 1, []>, []>;
 
+//===----------------------------------------------------------------------===//
+// Instruction naming conventions.
+//===----------------------------------------------------------------------===//
+
+// M = SME array register (ZA)
+// P = Predicate register
+// C = Predicate-as-counter register
+// I = immediate
+// Z = SVE vector register
+// T = ZT0 register
+//
+
 //===----------------------------------------------------------------------===//
 // Add vector elements horizontally or vertically to ZA tile.
 //===----------------------------------------------------------------------===//

diff  --git a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
index 39501c2cc868e..18fe871b636de 100644
--- a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -2890,7 +2890,7 @@ unsigned AArch64AsmParser::getNumRegsForRegKind(RegKind K) {
   case RegKind::SVEPredicateAsCounter:
     return 16;
   case RegKind::LookupTable:
-   return 512;
+   return 1;
   }
   llvm_unreachable("Unsupported RegKind");
 }