[PATCH] D62464: [PPC32] Improve 32-bit PowerPC

Rui Ueyama via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Wed Jun 5 20:48:36 PDT 2019


ruiu added inline comments.


================
Comment at: ELF/Arch/PPC.cpp:115
+  for (; Buf < End; Buf += 4)
+    write32(Buf, 0x60000000);
+}
----------------
Is this a nop? Can you add a comment?


================
Comment at: ELF/SyntheticSections.cpp:2313
+    // Then write PLTresolve.
+    Target->writePltHeader(Buf + 4 * N);
+    return;
----------------
Hmm, so we don't call writePlt() if a target is PPC32?


================
Comment at: ELF/Thunks.cpp:243
+class PPC32PltCallStub final : public Thunk {
+  // For R_PPC_PLTREL24, this records the addend, which will be used to decide
+  // the offsets in the call stub.
----------------
nit: usually we write public members before private members.


================
Comment at: ELF/Thunks.cpp:709
+void PPC32PltCallStub::writeTo(uint8_t *Buf) {
+  if (Config->Pic) {
+    uint32_t Offset;
----------------
nit: flip the condition and return early so that the indentation is one level shallower?


================
Comment at: ELF/Thunks.cpp:717-718
+                                            File->PPC32Got2OutSecOff + Addend);
+    }
+    else {
+      // The stub loads an address relative to _GLOBAL_OFFSET_TABLE_.
----------------
format.


Repository:
  rLLD LLVM Linker

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62464/new/

https://reviews.llvm.org/D62464





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