[llvm] BPF: Fix misfolding subregisters (PR #208244)

via llvm-commits llvm-commits at lists.llvm.org
Thu Jul 9 08:27:18 PDT 2026


github-actions[bot] wrote:

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<summary>
You can test this locally with the following command:
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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/BPF/BPFMIPeephole.cpp --diff_from_common_commit
``````````

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changing `origin/main` to the base branch/commit you want to compare against.
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/BPF/BPFMIPeephole.cpp b/llvm/lib/Target/BPF/BPFMIPeephole.cpp
index 1d1bfe632..a440f12a3 100644
--- a/llvm/lib/Target/BPF/BPFMIPeephole.cpp
+++ b/llvm/lib/Target/BPF/BPFMIPeephole.cpp
@@ -275,12 +275,12 @@ bool BPFMIPeephole::eliminateZExt() {
       Register src = MI.getOperand(1).getReg();
       if (MI.getOperand(1).getSubReg() == BPF::sub_32) {
         BuildMI(MBB, MI, MI.getDebugLoc(), TII->get(BPF::COPY), dst)
-          .add(MI.getOperand(1));
+            .add(MI.getOperand(1));
       } else {
         // Build a SUBREG_TO_REG instruction.
         BuildMI(MBB, MI, MI.getDebugLoc(), TII->get(BPF::SUBREG_TO_REG), dst)
-          .addReg(src)
-          .addImm(BPF::sub_32);
+            .addReg(src)
+            .addImm(BPF::sub_32);
       }
 
       ToErase = &MI;

``````````

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https://github.com/llvm/llvm-project/pull/208244


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