nickdesaulniers created this revision. Herald added a project: All. nickdesaulniers requested review of this revision. Herald added a project: clang. Herald added a subscriber: cfe-commits.
Consider the statement: int x = -1; And the following AST: `-VarDecl 0x55c4823a7670 <x.c:2:1, col:10> col:5 x 'int' cinit `-UnaryOperator 0x55c4823a7740 <col:9, col:10> 'int' prefix '-' `-IntegerLiteral 0x55c4823a7720 <col:10> 'int' 1 Return the evaluation of the subexpression negated. Repository: rG LLVM Github Monorepo https://reviews.llvm.org/D156378 Files: clang/lib/CodeGen/CGExprConstant.cpp Index: clang/lib/CodeGen/CGExprConstant.cpp =================================================================== --- clang/lib/CodeGen/CGExprConstant.cpp +++ clang/lib/CodeGen/CGExprConstant.cpp @@ -1363,6 +1363,19 @@ return Visit(E->getSubExpr(), T); } + llvm::Constant *VisitUnaryOperator(UnaryOperator *U, QualType T) { + switch (U->getOpcode()) { + default: + break; + case UO_Minus: + if (llvm::Constant *C = Visit(U->getSubExpr(), T)) + if (auto *CI = dyn_cast<llvm::ConstantInt>(C)) + return llvm::ConstantInt::get(CGM.getLLVMContext(), -CI->getValue()); + break; + } + return nullptr; + } + // Utility methods llvm::Type *ConvertType(QualType T) { return CGM.getTypes().ConvertType(T);
Index: clang/lib/CodeGen/CGExprConstant.cpp =================================================================== --- clang/lib/CodeGen/CGExprConstant.cpp +++ clang/lib/CodeGen/CGExprConstant.cpp @@ -1363,6 +1363,19 @@ return Visit(E->getSubExpr(), T); } + llvm::Constant *VisitUnaryOperator(UnaryOperator *U, QualType T) { + switch (U->getOpcode()) { + default: + break; + case UO_Minus: + if (llvm::Constant *C = Visit(U->getSubExpr(), T)) + if (auto *CI = dyn_cast<llvm::ConstantInt>(C)) + return llvm::ConstantInt::get(CGM.getLLVMContext(), -CI->getValue()); + break; + } + return nullptr; + } + // Utility methods llvm::Type *ConvertType(QualType T) { return CGM.getTypes().ConvertType(T);
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