[PATCH] D84387: [AST][RecoveryExpr] Suppress spurious "err_typecheck_expect_scalar_operand" diagnostic

[Haojian Wu via Phabricator via cfe-commits]

hokein created this revision.
hokein added a reviewer: sammccall.
Herald added a project: clang.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D84387

Files:
  clang/lib/Sema/SemaCast.cpp
  clang/test/Sema/error-dependence.c


Index: clang/test/Sema/error-dependence.c
===================================================================
--- clang/test/Sema/error-dependence.c
+++ clang/test/Sema/error-dependence.c
@@ -1,6 +1,6 @@
 // RUN: %clang_cc1 -fsyntax-only -verify -frecovery-ast -fno-recovery-ast-type -fc-dependence %s
 
-int call(int); // expected-note {{'call' declared here}}
+int call(int); // expected-note 2{{'call' declared here}}
 
 void test1(int s) {
   // verify "assigning to 'int' from incompatible type '<dependent type>'" is
@@ -12,8 +12,14 @@
   (*__builtin_classify_type)(1); // expected-error {{builtin functions must be directly called}}
 }
 
-void test2(int* ptr, float f) {
+void test2(int *ptr, float f) {
   // verify diagnostic "used type '<dependent type>' where arithmetic or pointer
   // type is required" is not emitted.
   ptr > f ? ptr : f; // expected-error {{invalid operands to binary expression}}
 }
+
+void test3(float f) {
+  // verify diagnostic "operand of type '<dependent type>' where arithmetic or
+  // pointer type is required" is not emitted.
+  f = (float)call(); // expected-error {{too few arguments to function call}}
+}
Index: clang/lib/Sema/SemaCast.cpp
===================================================================
--- clang/lib/Sema/SemaCast.cpp
+++ clang/lib/Sema/SemaCast.cpp
@@ -2690,6 +2690,16 @@
     return;
   }
 
+  if (Self.getLangOpts().CDependence &&
+      (DestType->isDependentType() || SrcExpr.get()->isTypeDependent() ||
+       SrcExpr.get()->isValueDependent())) {
+    assert((DestType->containsErrors() || SrcExpr.get()->containsErrors() ||
+            SrcExpr.get()->containsErrors()) &&
+           "should only occur in error-recovery path.");
+    assert(Kind == CK_Dependent);
+    return;
+  }
+
   // Overloads are allowed with C extensions, so we need to support them.
   if (SrcExpr.get()->getType() == Self.Context.OverloadTy) {
     DeclAccessPair DAP;


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