https://github.com/AmrDeveloper created https://github.com/llvm/llvm-project/pull/173009
Implement part of the ConstantExpr support for the ScalarExpr >From 60d23bf7463369e1bb2a613c7a6d2b7c7d5ef3b9 Mon Sep 17 00:00:00 2001 From: Amr Hesham <[email protected]> Date: Fri, 19 Dec 2025 15:23:47 +0100 Subject: [PATCH] [CIR] Implement part of ConstantExpr support for ScalarExpr --- clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp | 17 ++++++++++++ clang/test/CIR/CodeGen/constant-expr.cpp | 30 ++++++++++++++++++++++ 2 files changed, 47 insertions(+) create mode 100644 clang/test/CIR/CodeGen/constant-expr.cpp diff --git a/clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp b/clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp index dbd67b367ec4c..cc4048b5aa021 100644 --- a/clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp +++ b/clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp @@ -141,6 +141,23 @@ class ScalarExprEmitter : public StmtVisitor<ScalarExprEmitter, mlir::Value> { } mlir::Value VisitConstantExpr(ConstantExpr *e) { + // A constant expression of type 'void' generates no code and produces no + // value. + if (e->getType()->isVoidType()) { + return {}; + } + + if (mlir::Attribute result = ConstantEmitter(cgf).tryEmitConstantExpr(e)) { + if (e->isGLValue()) { + cgf.cgm.errorNYI(e->getSourceRange(), + "ScalarExprEmitter: constant expr GL Value"); + return {}; + } + + return builder.getConstant(cgf.getLoc(e->getSourceRange()), + mlir::cast<mlir::TypedAttr>(result)); + } + cgf.cgm.errorNYI(e->getSourceRange(), "ScalarExprEmitter: constant expr"); return {}; } diff --git a/clang/test/CIR/CodeGen/constant-expr.cpp b/clang/test/CIR/CodeGen/constant-expr.cpp new file mode 100644 index 0000000000000..e3325782b6fa3 --- /dev/null +++ b/clang/test/CIR/CodeGen/constant-expr.cpp @@ -0,0 +1,30 @@ +// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -Wno-unused-value -fclangir -emit-cir %s -o %t.cir +// RUN: FileCheck --input-file=%t.cir %s -check-prefix=CIR +// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -Wno-unused-value -fclangir -emit-llvm %s -o %t-cir.ll +// RUN: FileCheck --input-file=%t-cir.ll %s -check-prefix=LLVM +// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -Wno-unused-value -emit-llvm %s -o %t.ll +// RUN: FileCheck --input-file=%t.ll %s -check-prefix=OGCG + +struct StructWithConstEval { + consteval int consteval_ret_int() { return 1; } + consteval void consteval_ret_void() {} +}; + +void calling_consteval_methods() { + StructWithConstEval a; + int b = a.consteval_ret_int(); + a.consteval_ret_void(); +} + +// CIR: %[[A_ADDR:.*]] = cir.alloca !rec_StructWithConstEval, !cir.ptr<!rec_StructWithConstEval>, ["a"] +// CIR: %[[B_ADDR:.*]] = cir.alloca !s32i, !cir.ptr<!s32i>, ["b", init] +// CIR: %[[CONST_1:.*]] = cir.const #cir.int<1> : !s32i +// CIR: cir.store {{.*}} %[[CONST_1]], %[[B_ADDR]] : !s32i, !cir.ptr<!s32i> + +// LLVM: %[[A_ADDR:.*]] = alloca %struct.StructWithConstEval, i64 1, align 1 +// LLVM: %[[B_ADDR:.*]] = alloca i32, i64 1, align 4 +// LLVM: store i32 1, ptr %[[B_ADDR]], align 4 + +// OGCG: %[[A_ADDR:.*]] = alloca %struct.StructWithConstEval, align 1 +// OGCG: %[[B_ADDR:.*]] = alloca i32, align 4 +// OGCG: store i32 1, ptr %[[B_ADDR]], align 4 _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
