[llvm] [RISCV] Rename XTHeadVdot instruction to match their mnemonic. NFC (PR #146953)

[Craig Topper via llvm-commits]

https://github.com/topperc created https://github.com/llvm/llvm-project/pull/146953

We were using the extension name as a prefix rather than TH_.

>From aae440a548d62c4b5e826a8cf0dab0d8160cb37e Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Thu, 3 Jul 2025 12:38:55 -0700
Subject: [PATCH] [RISCV] Rename XTHeadVdot instruction to match their
 mnemonic. NFC

We were using the extension name as a prefix rather than TH_.
---
 llvm/lib/Target/RISCV/RISCVInstrInfoXTHead.td | 24 +++++++++----------
 .../Target/RISCV/RISCVInstrInfoTest.cpp       |  2 +-
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoXTHead.td b/llvm/lib/Target/RISCV/RISCVInstrInfoXTHead.td
index c23a58ceccead..c0f7ab127aeb7 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoXTHead.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoXTHead.td
@@ -476,10 +476,10 @@ def TH_FSURD : THStoreIndexed<FPR64, 0b01110, "th.fsurd">,
 } // DecoderNamespace = "XTHead"
 
 let Predicates = [HasVendorXTHeadVdot] in {
-defm THVdotVMAQA      : THVdotVMAQA<"th.vmaqa",     0b100000>;
-defm THVdotVMAQAU     : THVdotVMAQA<"th.vmaqau",    0b100010>;
-defm THVdotVMAQASU    : THVdotVMAQA<"th.vmaqasu",   0b100100>;
-defm THVdotVMAQAUS    : THVdotVMAQA_VX<"th.vmaqaus",0b100110>;
+defm TH_VMAQA      : THVdotVMAQA<"th.vmaqa",     0b100000>;
+defm TH_VMAQAU     : THVdotVMAQA<"th.vmaqau",    0b100010>;
+defm TH_VMAQASU    : THVdotVMAQA<"th.vmaqasu",   0b100100>;
+defm TH_VMAQAUS    : THVdotVMAQA_VX<"th.vmaqaus",0b100110>;
 }
 
 // Associate LMUL with tablegen records of register classes.
@@ -661,20 +661,20 @@ def : Pat<(i32 (sub GPR:$rd, (mul (sexti16 (i32 GPR:$rs1)),
 } // Predicates = [HasVendorXTHeadMac, IsRV32]
 
 let Predicates = [HasVendorXTHeadVdot] in {
-defm PseudoTHVdotVMAQA      : VPseudoVMAQA_VV_VX;
-defm PseudoTHVdotVMAQAU     : VPseudoVMAQA_VV_VX;
-defm PseudoTHVdotVMAQASU    : VPseudoVMAQA_VV_VX;
-defm PseudoTHVdotVMAQAUS    : VPseudoVMAQA_VX;
+defm PseudoTH_VMAQA      : VPseudoVMAQA_VV_VX;
+defm PseudoTH_VMAQAU     : VPseudoVMAQA_VV_VX;
+defm PseudoTH_VMAQASU    : VPseudoVMAQA_VV_VX;
+defm PseudoTH_VMAQAUS    : VPseudoVMAQA_VX;
 }
 
 let Predicates = [HasVendorXTHeadVdot] in {
-defm : VPatTernaryVMAQA_VV_VX<"int_riscv_th_vmaqa",  "PseudoTHVdotVMAQA",
+defm : VPatTernaryVMAQA_VV_VX<"int_riscv_th_vmaqa",  "PseudoTH_VMAQA",
                               AllQuadWidenableInt8NoVLMulVectors>;
-defm : VPatTernaryVMAQA_VV_VX<"int_riscv_th_vmaqau", "PseudoTHVdotVMAQAU",
+defm : VPatTernaryVMAQA_VV_VX<"int_riscv_th_vmaqau", "PseudoTH_VMAQAU",
                               AllQuadWidenableInt8NoVLMulVectors>;
-defm : VPatTernaryVMAQA_VV_VX<"int_riscv_th_vmaqasu","PseudoTHVdotVMAQASU",
+defm : VPatTernaryVMAQA_VV_VX<"int_riscv_th_vmaqasu","PseudoTH_VMAQASU",
                               AllQuadWidenableInt8NoVLMulVectors>;
-defm : VPatTernaryVMAQA_VX<"int_riscv_th_vmaqaus",   "PseudoTHVdotVMAQAUS",
+defm : VPatTernaryVMAQA_VX<"int_riscv_th_vmaqaus",   "PseudoTH_VMAQAUS",
                            AllQuadWidenableInt8NoVLMulVectors>;
 }
 
diff --git a/llvm/unittests/Target/RISCV/RISCVInstrInfoTest.cpp b/llvm/unittests/Target/RISCV/RISCVInstrInfoTest.cpp
index 0e6c1172ee9b5..f5d7de9087d91 100644
--- a/llvm/unittests/Target/RISCV/RISCVInstrInfoTest.cpp
+++ b/llvm/unittests/Target/RISCV/RISCVInstrInfoTest.cpp
@@ -376,7 +376,7 @@ TEST_P(RISCVInstrInfoTest, GetDestEEW) {
   EXPECT_EQ(RISCV::getDestLog2EEW(TII->get(RISCV::VIOTA_M), 3), 3u);
   EXPECT_EQ(RISCV::getDestLog2EEW(TII->get(RISCV::VQMACCU_2x8x2), 3), 5u);
   EXPECT_EQ(RISCV::getDestLog2EEW(TII->get(RISCV::VFWMACC_4x4x4), 4), 5u);
-  EXPECT_EQ(RISCV::getDestLog2EEW(TII->get(RISCV::THVdotVMAQA_VV), 5), 5u);
+  EXPECT_EQ(RISCV::getDestLog2EEW(TII->get(RISCV::TH_VMAQA_VV), 5), 5u);
 }
 
 } // namespace