Vendor import of llvm trunk r238337:

https://llvm.org/svn/llvm-project/llvm/trunk@238337

1 files changed, 21 insertions, 0 deletions

diff --git a/lib/MC/MCELFObjectTargetWriter.cpp b/lib/MC/MCELFObjectTargetWriter.cpp
index 84176dc..dc3d6c3 100644
--- a/lib/MC/MCELFObjectTargetWriter.cpp
+++ b/lib/MC/MCELFObjectTargetWriter.cpp
@@ -28,3 +28,24 @@ bool MCELFObjectTargetWriter::needsRelocateWithSymbol(const MCSymbolData &SD,
                                                       unsigned Type) const {
   return false;
 }
+
+// ELF doesn't require relocations to be in any order. We sort by the Offset,
+// just to match gnu as for easier comparison. The use type is an arbitrary way
+// of making the sort deterministic.
+static int cmpRel(const ELFRelocationEntry *AP, const ELFRelocationEntry *BP) {
+  const ELFRelocationEntry &A = *AP;
+  const ELFRelocationEntry &B = *BP;
+  if (A.Offset != B.Offset)
+    return B.Offset - A.Offset;
+  if (B.Type != A.Type)
+    return A.Type - B.Type;
+  //llvm_unreachable("ELFRelocs might be unstable!");
+  return 0;
+}
+
+
+void
+MCELFObjectTargetWriter::sortRelocs(const MCAssembler &Asm,
+                                    std::vector<ELFRelocationEntry> &Relocs) {
+  array_pod_sort(Relocs.begin(), Relocs.end(), cmpRel);
+}