[PATCH] D134702: [Clang] Don't warn if deferencing void pointers in unevaluated context

[Jun Zhang via Phabricator via cfe-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG89e56e732d5e: [Clang] Don't warn if deferencing void 
pointers in unevaluated context (authored by junaire).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D134702/new/

https://reviews.llvm.org/D134702

Files:
  clang/lib/Sema/SemaExpr.cpp
  clang/test/Analysis/misc-ps.m
  clang/test/Sema/no-warn-void-ptr-uneval.c


Index: clang/test/Sema/no-warn-void-ptr-uneval.c
===================================================================
--- /dev/null
+++ clang/test/Sema/no-warn-void-ptr-uneval.c
@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -verify %s
+
+// expected-no-diagnostics
+void foo(void *vp) {
+  sizeof(*vp);
+  sizeof(*(vp));
+  void inner(typeof(*vp));
+}
Index: clang/test/Analysis/misc-ps.m
===================================================================
--- clang/test/Analysis/misc-ps.m
+++ clang/test/Analysis/misc-ps.m
@@ -133,7 +133,7 @@
   void* q;
   
   if (!flag) {
-    if (sizeof(*q) == 1) // expected-warning {{ISO C does not allow 
indirection on operand of type 'void *'}}
+    if (sizeof(*q) == 1)
       return;
     // Infeasibe.
     *p = 1; // no-warning
Index: clang/lib/Sema/SemaExpr.cpp
===================================================================
--- clang/lib/Sema/SemaExpr.cpp
+++ clang/lib/Sema/SemaExpr.cpp
@@ -14536,7 +14536,7 @@
     //   [...] the expression to which [the unary * operator] is applied shall
     //   be a pointer to an object type, or a pointer to a function type
     LangOptions LO = S.getLangOpts();
-    if (LO.CPlusPlus || !(LO.C99 && IsAfterAmp))
+    if (LO.CPlusPlus || !(LO.C99 && (IsAfterAmp || S.isUnevaluatedContext())))
       S.Diag(OpLoc, diag::ext_typecheck_indirection_through_void_pointer)
           << LO.CPlusPlus << OpTy << Op->getSourceRange();
   }



Index: clang/test/Sema/no-warn-void-ptr-uneval.c
===================================================================
--- /dev/null
+++ clang/test/Sema/no-warn-void-ptr-uneval.c
@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -verify %s
+
+// expected-no-diagnostics
+void foo(void *vp) {
+  sizeof(*vp);
+  sizeof(*(vp));
+  void inner(typeof(*vp));
+}
Index: clang/test/Analysis/misc-ps.m
===================================================================
--- clang/test/Analysis/misc-ps.m
+++ clang/test/Analysis/misc-ps.m
@@ -133,7 +133,7 @@
   void* q;
   
   if (!flag) {
-    if (sizeof(*q) == 1) // expected-warning {{ISO C does not allow indirection on operand of type 'void *'}}
+    if (sizeof(*q) == 1)
       return;
     // Infeasibe.
     *p = 1; // no-warning
Index: clang/lib/Sema/SemaExpr.cpp
===================================================================
--- clang/lib/Sema/SemaExpr.cpp
+++ clang/lib/Sema/SemaExpr.cpp
@@ -14536,7 +14536,7 @@
     //   [...] the expression to which [the unary * operator] is applied shall
     //   be a pointer to an object type, or a pointer to a function type
     LangOptions LO = S.getLangOpts();
-    if (LO.CPlusPlus || !(LO.C99 && IsAfterAmp))
+    if (LO.CPlusPlus || !(LO.C99 && (IsAfterAmp || S.isUnevaluatedContext())))
       S.Diag(OpLoc, diag::ext_typecheck_indirection_through_void_pointer)
           << LO.CPlusPlus << OpTy << Op->getSourceRange();
   }

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