[llvm] [RISCV] Fold LI 1 / SLLI into BSETI during i64 materialization (PR #142348)

[via llvm-commits]

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You can test this locally with the following command:
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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions cpp -- llvm/lib/Target/RISCV/MCTargetDesc/RISCVMatInt.cpp
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View the diff from clang-format here.
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diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVMatInt.cpp b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVMatInt.cpp
index f23912961..323bcfc11 100644
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVMatInt.cpp
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVMatInt.cpp
@@ -357,7 +357,7 @@ InstSeq generateInstSeq(int64_t Val, const MCSubtargetInfo &STI) {
     // Fold LI 1 + SLLI into BSETI.
     if (Res[0].getOpcode() == RISCV::ADDI && Res[0].getImm() == 1 &&
         Res[1].getOpcode() == RISCV::SLLI) {
-      Res.erase(Res.begin()); // Remove ADDI.
+      Res.erase(Res.begin());                                 // Remove ADDI.
       Res.front() = Inst(RISCV::BSETI, Res.front().getImm()); // Patch SLLI.
     }
   }

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https://github.com/llvm/llvm-project/pull/142348