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[CIR][CodeGen] Implemented noexcept expression handling #1752

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Merged
merged 1 commit into from
Jul 25, 2025
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[CIR][CodeGen] Implemented noexcept expression handling #1752

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2 changes: 1 addition & 1 deletion clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -728,7 +728,7 @@ class ScalarExprEmitter : public StmtVisitor<ScalarExprEmitter, mlir::Value> {
return nullptr;
}
mlir::Value VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
llvm_unreachable("NYI");
return CGF.getBuilder().getBool(E->getValue(), CGF.getLoc(E->getExprLoc()));
}

/// Perform a pointer to boolean conversion.
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36 changes: 36 additions & 0 deletions clang/test/CIR/CodeGen/noexcept.cpp
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Original file line number Diff line number Diff line change
@@ -0,0 +1,36 @@
// RUN: %clang_cc1 -x c++ -triple x86_64-unknown-linux-gnu -fclangir -emit-cir -std=c++11 %s -o %t.cir
// RUN: FileCheck --input-file=%t.cir %s

void may_throw();
void no_throw() noexcept;

bool test_noexcept_func_false() {
return noexcept(may_throw());
}
// CHECK-LABEL: cir.func{{.*}} @_Z24test_noexcept_func_falsev
// CHECK: %[[CONST:.*]] = cir.const #false
// CHECK: cir.return

bool test_noexcept_func_true() {
return noexcept(no_throw());
}
// CHECK-LABEL: cir.func{{.*}} @_Z23test_noexcept_func_truev
// CHECK: %[[CONST:.*]] = cir.const #true
// CHECK: cir.return

auto lambda_may_throw = []() {};
auto lambda_no_throw = []() noexcept {};

bool test_noexcept_lambda_false() {
return noexcept(lambda_may_throw());
}
// CHECK-LABEL: cir.func{{.*}} @_Z26test_noexcept_lambda_falsev
// CHECK: %[[CONST:.*]] = cir.const #false
// CHECK: cir.return

bool test_noexcept_lambda_true() {
return noexcept(lambda_no_throw());
}
// CHECK-LABEL: cir.func{{.*}} @_Z25test_noexcept_lambda_truev
// CHECK: %[[CONST:.*]] = cir.const #true
// CHECK: cir.return
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