tbaeder created this revision.
tbaeder added reviewers: aaron.ballman, tahonermann, shafik, erichkeane.
Herald added a project: All.
tbaeder requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.
AFAIK this is just used to suppress warnings, so ignore it altogether.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D148690
Files:
clang/lib/AST/Interp/ByteCodeExprGen.cpp
clang/test/AST/Interp/literals.cpp
Index: clang/test/AST/Interp/literals.cpp
===================================================================
--- clang/test/AST/Interp/literals.cpp
+++ clang/test/AST/Interp/literals.cpp
@@ -782,6 +782,12 @@
namespace PredefinedExprs {
constexpr char heh(unsigned index) {
+#if __cplusplus >= 201402L
+ __FUNCTION__; // ref-warning {{result unused}} \
+ // expected-warning {{result unused}}
+ __extension__ __FUNCTION__; // ref-warning {{result unused}} \
+ // expected-warning {{result unused}}
+#endif
return __FUNCTION__[index];
}
static_assert(heh(0) == 'h', "");
Index: clang/lib/AST/Interp/ByteCodeExprGen.cpp
===================================================================
--- clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -1856,6 +1856,9 @@
case UO_Real: // __real x
case UO_Imag: // __imag x
case UO_Extension:
+ if (DiscardResult)
+ return this->discard(SubExpr);
+ return this->visit(SubExpr);
case UO_Coawait:
assert(false && "Unhandled opcode");
}
Index: clang/test/AST/Interp/literals.cpp
===================================================================
--- clang/test/AST/Interp/literals.cpp
+++ clang/test/AST/Interp/literals.cpp
@@ -782,6 +782,12 @@
namespace PredefinedExprs {
constexpr char heh(unsigned index) {
+#if __cplusplus >= 201402L
+ __FUNCTION__; // ref-warning {{result unused}} \
+ // expected-warning {{result unused}}
+ __extension__ __FUNCTION__; // ref-warning {{result unused}} \
+ // expected-warning {{result unused}}
+#endif
return __FUNCTION__[index];
}
static_assert(heh(0) == 'h', "");
Index: clang/lib/AST/Interp/ByteCodeExprGen.cpp
===================================================================
--- clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -1856,6 +1856,9 @@
case UO_Real: // __real x
case UO_Imag: // __imag x
case UO_Extension:
+ if (DiscardResult)
+ return this->discard(SubExpr);
+ return this->visit(SubExpr);
case UO_Coawait:
assert(false && "Unhandled opcode");
}
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