xbolva00 updated this revision to Diff 165654.
xbolva00 added a comment.
1. Error -> Warning
https://reviews.llvm.org/D52137
Files:
include/clang/Basic/DiagnosticSemaKinds.td
lib/Sema/SemaExpr.cpp
test/CXX/drs/dr6xx.cpp
test/OpenMP/teams_distribute_thread_limit_messages.cpp
test/OpenMP/teams_thread_limit_messages.cpp
test/Sema/unary-minus-unsigned.c
Index: test/Sema/unary-minus-unsigned.c
===================================================================
--- test/Sema/unary-minus-unsigned.c
+++ test/Sema/unary-minus-unsigned.c
@@ -0,0 +1,15 @@
+// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only
+
+void test1(void) {
+ unsigned int a = 1;
+ unsigned long b = 2;
+ unsigned long long c = 1;
+
+ unsigned int a2 = -a; // expected-warning {{unary minus operator applied to type 'unsigned int', result value is still unsigned}}
+ unsigned long b2 = -b; // expected-warning {{unary minus operator applied to type 'unsigned long', result value is still unsigned}}
+ unsigned long long c2 = -c; // expected-warning {{unary minus operator applied to type 'unsigned long long', result value is still unsigned}}
+
+ int a3 = -a; // expected-warning {{unary minus operator applied to type 'unsigned int', result value is still unsigned}}
+ long b3 = -b; // expected-warning {{unary minus operator applied to type 'unsigned long', result value is still unsigned}}
+ long long c3 = -c; // expected-warning {{unary minus operator applied to type 'unsigned long long', result value is still unsigned}}
+ }
Index: test/OpenMP/teams_thread_limit_messages.cpp
===================================================================
--- test/OpenMP/teams_thread_limit_messages.cpp
+++ test/OpenMP/teams_thread_limit_messages.cpp
@@ -51,7 +51,7 @@
#pragma omp teams thread_limit(-2) // expected-error {{argument to 'thread_limit' clause must be a strictly positive integer value}}
foo();
#pragma omp target
-#pragma omp teams thread_limit(-10u)
+#pragma omp teams thread_limit(-10u) // expected-warning {{unary minus operator applied to type 'unsigned int', result value is still unsigned}}
foo();
#pragma omp target
#pragma omp teams thread_limit(3.14) // expected-error 2 {{expression must have integral or unscoped enumeration type, not 'double'}}
@@ -102,7 +102,7 @@
foo();
#pragma omp target
-#pragma omp teams thread_limit (-10u)
+#pragma omp teams thread_limit (-10u) // expected-warning {{unary minus operator applied to type 'unsigned int', result value is still unsigned}}
foo();
#pragma omp target
Index: test/OpenMP/teams_distribute_thread_limit_messages.cpp
===================================================================
--- test/OpenMP/teams_distribute_thread_limit_messages.cpp
+++ test/OpenMP/teams_distribute_thread_limit_messages.cpp
@@ -51,7 +51,7 @@
#pragma omp teams distribute thread_limit(-2) // expected-error {{argument to 'thread_limit' clause must be a strictly positive integer value}}
for (int j=0; j<100; j++) foo();
#pragma omp target
-#pragma omp teams distribute thread_limit(-10u)
+#pragma omp teams distribute thread_limit(-10u) // expected-warning {{unary minus operator applied to type 'unsigned int', result value is still unsigned}}
for (int j=0; j<100; j++) foo();
#pragma omp target
#pragma omp teams distribute thread_limit(3.14) // expected-error 2 {{expression must have integral or unscoped enumeration type, not 'double'}}
@@ -102,7 +102,7 @@
for (int j=0; j<100; j++) foo();
#pragma omp target
-#pragma omp teams distribute thread_limit (-10u)
+#pragma omp teams distribute thread_limit (-10u) // expected-warning {{unary minus operator applied to type 'unsigned int', result value is still unsigned}}
for (int j=0; j<100; j++) foo();
#pragma omp target
Index: test/CXX/drs/dr6xx.cpp
===================================================================
--- test/CXX/drs/dr6xx.cpp
+++ test/CXX/drs/dr6xx.cpp
@@ -91,7 +91,8 @@
struct D : B, C {};
}
-int dr610[-0u == 0u ? 1 : -1]; // dr610: yes
+int dr610[-0u == 0u ? // expected-warning {{unary minus operator applied to type 'unsigned int', result value is still unsigned}}
+ 1 : -1]; // dr610: yes
namespace dr611 { // dr611: yes
int k;
Index: lib/Sema/SemaExpr.cpp
===================================================================
--- lib/Sema/SemaExpr.cpp
+++ lib/Sema/SemaExpr.cpp
@@ -12646,8 +12646,12 @@
resultType = Input.get()->getType();
if (resultType->isDependentType())
break;
- if (resultType->isArithmeticType()) // C99 6.5.3.3p1
+ if (resultType->isArithmeticType()) { // C99 6.5.3.3p1
+ if (Opc == UO_Minus && resultType->isUnsignedIntegerType())
+ return Diag(OpLoc, diag::warn_unsignedtypecheck_unary_minus)
+ << resultType << Input.get()->getSourceRange();
break;
+ }
else if (resultType->isVectorType() &&
// The z vector extensions don't allow + or - with bool vectors.
(!Context.getLangOpts().ZVector ||
Index: include/clang/Basic/DiagnosticSemaKinds.td
===================================================================
--- include/clang/Basic/DiagnosticSemaKinds.td
+++ include/clang/Basic/DiagnosticSemaKinds.td
@@ -5820,6 +5820,9 @@
"taking the address of a destructor">;
def err_typecheck_unary_expr : Error<
"invalid argument type %0 to unary expression">;
+def warn_unsignedtypecheck_unary_minus : Warning<
+ "unary minus operator applied to type %0, result value is still unsigned">,
+ InGroup<SignConversion>;
def err_typecheck_indirection_requires_pointer : Error<
"indirection requires pointer operand (%0 invalid)">;
def ext_typecheck_indirection_through_void_pointer : ExtWarn<
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