MCExpr: Move isSymbolUsedInExpression workaround to AMDGPU

This function was a workaround used to detect cyclic dependency
(properly resolved by 343428c666f9293ae260bbcf79130562b830b268).
We do not want backends to use it. However, #112251 exposed it to MCExpr
to be reused by AMDGPU. Keep the workaround within AMDGPU to prevent
other backends from accidentally relying on it.

1 files changed, 0 insertions, 32 deletions

diff --git a/llvm/lib/MC/MCExpr.cpp b/llvm/lib/MC/MCExpr.cpp
index e4172bf..aec6987 100644
--- a/llvm/lib/MC/MCExpr.cpp
+++ b/llvm/lib/MC/MCExpr.cpp
@@ -187,38 +187,6 @@ LLVM_DUMP_METHOD void MCExpr::dump() const {
 }
 #endif
 
-bool MCExpr::isSymbolUsedInExpression(const MCSymbol *Sym) const {
-  switch (getKind()) {
-  case MCExpr::Binary: {
-    const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(this);
-    return BE->getLHS()->isSymbolUsedInExpression(Sym) ||
-           BE->getRHS()->isSymbolUsedInExpression(Sym);
-  }
-  case MCExpr::Target: {
-    const MCTargetExpr *TE = static_cast<const MCTargetExpr *>(this);
-    return TE->isSymbolUsedInExpression(Sym);
-  }
-  case MCExpr::Constant:
-    return false;
-  case MCExpr::SymbolRef: {
-    const MCSymbol &S = static_cast<const MCSymbolRefExpr *>(this)->getSymbol();
-    if (S.isVariable() && !S.isWeakExternal())
-      return S.getVariableValue()->isSymbolUsedInExpression(Sym);
-    return &S == Sym;
-  }
-  case MCExpr::Unary: {
-    const MCExpr *SubExpr =
-        static_cast<const MCUnaryExpr *>(this)->getSubExpr();
-    return SubExpr->isSymbolUsedInExpression(Sym);
-  }
-  case MCExpr::Specifier:
-    return static_cast<const MCSpecifierExpr *>(this)->isSymbolUsedInExpression(
-        Sym);
-  }
-
-  llvm_unreachable("Unknown expr kind!");
-}
-
 /* *** */
 
 const MCBinaryExpr *MCBinaryExpr::create(Opcode Opc, const MCExpr *LHS,