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-rw-r--r--lib/Sema/Sema.h3
-rw-r--r--lib/Sema/SemaExpr.cpp39
-rw-r--r--test/Sema/compare.c205
-rw-r--r--test/SemaCXX/compare.cpp204
4 files changed, 417 insertions, 34 deletions
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index c4de6be9eb..cad06d7e0a 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -1610,7 +1610,8 @@ public:
Expr **Args, unsigned NumArgs);
void CheckSignCompare(Expr *LHS, Expr *RHS, SourceLocation Loc,
- const PartialDiagnostic &PD);
+ const PartialDiagnostic &PD,
+ bool Equality = false);
virtual ExpressionEvaluationContext
PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext);
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 031bbe77ac..d92f4b99ff 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -4445,9 +4445,15 @@ QualType Sema::CheckShiftOperands(Expr *&lex, Expr *&rex, SourceLocation Loc,
return LHSTy;
}
-/// Implements -Wsign-compare.
+/// \brief Implements -Wsign-compare.
+///
+/// \param lex the left-hand expression
+/// \param rex the right-hand expression
+/// \param OpLoc the location of the joining operator
+/// \param Equality whether this is an "equality-like" join;
+/// this suppresses the warning in some cases
void Sema::CheckSignCompare(Expr *lex, Expr *rex, SourceLocation OpLoc,
- const PartialDiagnostic &PD) {
+ const PartialDiagnostic &PD, bool Equality) {
QualType lt = lex->getType(), rt = rex->getType();
// Only warn if both operands are integral.
@@ -4461,15 +4467,25 @@ void Sema::CheckSignCompare(Expr *lex, Expr *rex, SourceLocation OpLoc,
// The rule is that the signed operand becomes unsigned, so isolate the
// signed operand.
- Expr *signedOperand;
+ Expr *signedOperand, *unsignedOperand;
if (lt->isSignedIntegerType()) {
if (rt->isSignedIntegerType()) return;
signedOperand = lex;
+ unsignedOperand = rex;
} else {
if (!rt->isSignedIntegerType()) return;
signedOperand = rex;
+ unsignedOperand = lex;
}
+ // If the unsigned type is strictly smaller than the signed type,
+ // then (1) the result type will be signed and (2) the unsigned type
+ // will fight losslessly within the signed type, and so the result
+ // of the comparison will be exact.
+ if (Context.getIntWidth(signedOperand->getType()) >
+ Context.getIntWidth(unsignedOperand->getType()))
+ return;
+
// If the value is a non-negative integer constant, then the
// signed->unsigned conversion won't change it.
llvm::APSInt value;
@@ -4480,6 +4496,20 @@ void Sema::CheckSignCompare(Expr *lex, Expr *rex, SourceLocation OpLoc,
return;
}
+ if (Equality) {
+ // For (in)equality comparisons, if the unsigned operand is a
+ // constant no greater than the maximum signed operand, then
+ // reinterpreting the signed operand as unsigned will not change
+ // the result of the comparison.
+ if (unsignedOperand->isIntegerConstantExpr(value, Context)) {
+ assert(!value.isSigned() && "result of unsigned expression is signed");
+
+ // 2's complement: test the top bit.
+ if (value.isNonNegative())
+ return;
+ }
+ }
+
Diag(OpLoc, PD)
<< lex->getType() << rex->getType()
<< lex->getSourceRange() << rex->getSourceRange();
@@ -4493,7 +4523,8 @@ QualType Sema::CheckCompareOperands(Expr *&lex, Expr *&rex, SourceLocation Loc,
if (lex->getType()->isVectorType() || rex->getType()->isVectorType())
return CheckVectorCompareOperands(lex, rex, Loc, isRelational);
- CheckSignCompare(lex, rex, Loc, diag::warn_mixed_sign_comparison);
+ CheckSignCompare(lex, rex, Loc, diag::warn_mixed_sign_comparison,
+ (Opc == BinaryOperator::EQ || Opc == BinaryOperator::NE));
// C99 6.5.8p3 / C99 6.5.9p4
if (lex->getType()->isArithmeticType() && rex->getType()->isArithmeticType())
diff --git a/test/Sema/compare.c b/test/Sema/compare.c
index 45a100be1e..9d7168d179 100644
--- a/test/Sema/compare.c
+++ b/test/Sema/compare.c
@@ -8,23 +8,194 @@ int test(char *C) { // nothing here should warn.
}
int ints(long a, unsigned long b) {
- return (a == b) + // expected-warning {{comparison of integers of different signs}}
- ((int)a == b) + // expected-warning {{comparison of integers of different signs}}
- ((short)a == b) + // expected-warning {{comparison of integers of different signs}}
- (a == (unsigned int) b) + // expected-warning {{comparison of integers of different signs}}
- (a == (unsigned short) b); // expected-warning {{comparison of integers of different signs}}
-
- enum Enum {B};
- return (a == B) +
- ((int)a == B) +
- ((short)a == B) +
- (a == (unsigned int) B) + // expected-warning {{comparison of integers of different signs}}
- (a == (unsigned short) B); // expected-warning {{comparison of integers of different signs}}
-
- // Should be able to prove all of these are non-negative.
- return (b == (long) B) +
- (b == (int) B) +
- (b == (short) B);
+ enum EnumA {A};
+ enum EnumB {B};
+ enum EnumC {C = 0x10000};
+ return
+ // (a,b)
+ (a == (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ (a == (unsigned int) b) +
+ (a == (unsigned short) b) +
+ (a == (unsigned char) b) +
+ ((long) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((long) a == (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a == (unsigned int) b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a == (unsigned short) b) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a == (unsigned char) b) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned int) b) +
+ (a < (unsigned short) b) +
+ (a < (unsigned char) b) +
+ ((long) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((long) a < (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < (unsigned int) b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < (unsigned short) b) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < (unsigned char) b) + // expected-warning {{comparison of integers of different signs}}
+
+ // (A,b)
+ (A == (unsigned long) b) +
+ (A == (unsigned int) b) +
+ (A == (unsigned short) b) +
+ (A == (unsigned char) b) +
+ ((long) A == b) +
+ ((int) A == b) +
+ ((short) A == b) +
+ ((signed char) A == b) +
+ ((long) A == (unsigned long) b) +
+ ((int) A == (unsigned int) b) +
+ ((short) A == (unsigned short) b) +
+ ((signed char) A == (unsigned char) b) +
+ (A < (unsigned long) b) +
+ (A < (unsigned int) b) +
+ (A < (unsigned short) b) +
+ (A < (unsigned char) b) +
+ ((long) A < b) +
+ ((int) A < b) +
+ ((short) A < b) +
+ ((signed char) A < b) +
+ ((long) A < (unsigned long) b) +
+ ((int) A < (unsigned int) b) +
+ ((short) A < (unsigned short) b) +
+ ((signed char) A < (unsigned char) b) +
+
+ // (a,B)
+ (a == (unsigned long) B) +
+ (a == (unsigned int) B) +
+ (a == (unsigned short) B) +
+ (a == (unsigned char) B) +
+ ((long) a == B) +
+ ((int) a == B) +
+ ((short) a == B) +
+ ((signed char) a == B) +
+ ((long) a == (unsigned long) B) +
+ ((int) a == (unsigned int) B) +
+ ((short) a == (unsigned short) B) +
+ ((signed char) a == (unsigned char) B) +
+ (a < (unsigned long) B) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned int) B) +
+ (a < (unsigned short) B) +
+ (a < (unsigned char) B) +
+ ((long) a < B) +
+ ((int) a < B) +
+ ((short) a < B) +
+ ((signed char) a < B) +
+ ((long) a < (unsigned long) B) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < (unsigned int) B) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < (unsigned short) B) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < (unsigned char) B) + // expected-warning {{comparison of integers of different signs}}
+
+ // (C,b)
+ (C == (unsigned long) b) +
+ (C == (unsigned int) b) +
+ (C == (unsigned short) b) +
+ (C == (unsigned char) b) +
+ ((long) C == b) +
+ ((int) C == b) +
+ ((short) C == b) +
+ ((signed char) C == b) +
+ ((long) C == (unsigned long) b) +
+ ((int) C == (unsigned int) b) +
+ ((short) C == (unsigned short) b) +
+ ((signed char) C == (unsigned char) b) +
+ (C < (unsigned long) b) +
+ (C < (unsigned int) b) +
+ (C < (unsigned short) b) +
+ (C < (unsigned char) b) +
+ ((long) C < b) +
+ ((int) C < b) +
+ ((short) C < b) +
+ ((signed char) C < b) +
+ ((long) C < (unsigned long) b) +
+ ((int) C < (unsigned int) b) +
+ ((short) C < (unsigned short) b) +
+ ((signed char) C < (unsigned char) b) +
+
+ // (a,C)
+ (a == (unsigned long) C) +
+ (a == (unsigned int) C) +
+ (a == (unsigned short) C) +
+ (a == (unsigned char) C) +
+ ((long) a == C) +
+ ((int) a == C) +
+ ((short) a == C) +
+ ((signed char) a == C) +
+ ((long) a == (unsigned long) C) +
+ ((int) a == (unsigned int) C) +
+ ((short) a == (unsigned short) C) +
+ ((signed char) a == (unsigned char) C) +
+ (a < (unsigned long) C) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned int) C) +
+ (a < (unsigned short) C) +
+ (a < (unsigned char) C) +
+ ((long) a < C) +
+ ((int) a < C) +
+ ((short) a < C) +
+ ((signed char) a < C) +
+ ((long) a < (unsigned long) C) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < (unsigned int) C) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < (unsigned short) C) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < (unsigned char) C) + // expected-warning {{comparison of integers of different signs}}
+
+ // (0x80000,b)
+ (0x80000 == (unsigned long) b) +
+ (0x80000 == (unsigned int) b) +
+ (0x80000 == (unsigned short) b) +
+ (0x80000 == (unsigned char) b) +
+ ((long) 0x80000 == b) +
+ ((int) 0x80000 == b) +
+ ((short) 0x80000 == b) +
+ ((signed char) 0x80000 == b) +
+ ((long) 0x80000 == (unsigned long) b) +
+ ((int) 0x80000 == (unsigned int) b) +
+ ((short) 0x80000 == (unsigned short) b) +
+ ((signed char) 0x80000 == (unsigned char) b) +
+ (0x80000 < (unsigned long) b) +
+ (0x80000 < (unsigned int) b) +
+ (0x80000 < (unsigned short) b) +
+ (0x80000 < (unsigned char) b) +
+ ((long) 0x80000 < b) +
+ ((int) 0x80000 < b) +
+ ((short) 0x80000 < b) +
+ ((signed char) 0x80000 < b) +
+ ((long) 0x80000 < (unsigned long) b) +
+ ((int) 0x80000 < (unsigned int) b) +
+ ((short) 0x80000 < (unsigned short) b) +
+ ((signed char) 0x80000 < (unsigned char) b) +
+
+ // (a,0x80000)
+ (a == (unsigned long) 0x80000) +
+ (a == (unsigned int) 0x80000) +
+ (a == (unsigned short) 0x80000) +
+ (a == (unsigned char) 0x80000) +
+ ((long) a == 0x80000) +
+ ((int) a == 0x80000) +
+ ((short) a == 0x80000) +
+ ((signed char) a == 0x80000) +
+ ((long) a == (unsigned long) 0x80000) +
+ ((int) a == (unsigned int) 0x80000) +
+ ((short) a == (unsigned short) 0x80000) +
+ ((signed char) a == (unsigned char) 0x80000) +
+ (a < (unsigned long) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned int) 0x80000) +
+ (a < (unsigned short) 0x80000) +
+ (a < (unsigned char) 0x80000) +
+ ((long) a < 0x80000) +
+ ((int) a < 0x80000) +
+ ((short) a < 0x80000) +
+ ((signed char) a < 0x80000) +
+ ((long) a < (unsigned long) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < (unsigned int) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < (unsigned short) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < (unsigned char) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+
+ 10
+ ;
}
int equal(char *a, const char *b) {
diff --git a/test/SemaCXX/compare.cpp b/test/SemaCXX/compare.cpp
index 2a2963493b..e38b6b312f 100644
--- a/test/SemaCXX/compare.cpp
+++ b/test/SemaCXX/compare.cpp
@@ -1,15 +1,195 @@
-// RUN: clang-cc -fsyntax-only -pedantic -verify -Wsign-compare %s
+// Force x86-64 because some of our heuristics are actually based
+// on integer sizes.
+
+// RUN: clang-cc -triple x86_64-apple-darwin -fsyntax-only -pedantic -verify -Wsign-compare %s
int test0(long a, unsigned long b) {
- enum Enum {B};
- return (a == B) + // expected-warning {{comparison of integers of different signs}}
- ((int)a == B) + // expected-warning {{comparison of integers of different signs}}
- ((short)a == B) + // expected-warning {{comparison of integers of different signs}}
- (a == (unsigned int) B) + // expected-warning {{comparison of integers of different signs}}
- (a == (unsigned short) B); // expected-warning {{comparison of integers of different signs}}
-
- // Should be able to prove all of these are non-negative.
- return (b == (long) B) +
- (b == (int) B) +
- (b == (short) B);
+ enum EnumA {A};
+ enum EnumB {B};
+ enum EnumC {C = 0x10000};
+ return
+ // (a,b)
+ (a == (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ (a == (unsigned int) b) +
+ (a == (unsigned short) b) +
+ (a == (unsigned char) b) +
+ ((long) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a == b) + // expected-warning {{comparison of integers of different signs}}
+ ((long) a == (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a == (unsigned int) b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a == (unsigned short) b) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a == (unsigned char) b) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned int) b) +
+ (a < (unsigned short) b) +
+ (a < (unsigned char) b) +
+ ((long) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < b) + // expected-warning {{comparison of integers of different signs}}
+ ((long) a < (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < (unsigned int) b) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < (unsigned short) b) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < (unsigned char) b) + // expected-warning {{comparison of integers of different signs}}
+
+ // (A,b)
+ (A == (unsigned long) b) +
+ (A == (unsigned int) b) +
+ (A == (unsigned short) b) +
+ (A == (unsigned char) b) +
+ ((long) A == b) +
+ ((int) A == b) +
+ ((short) A == b) +
+ ((signed char) A == b) +
+ ((long) A == (unsigned long) b) +
+ ((int) A == (unsigned int) b) +
+ ((short) A == (unsigned short) b) +
+ ((signed char) A == (unsigned char) b) +
+ (A < (unsigned long) b) +
+ (A < (unsigned int) b) +
+ (A < (unsigned short) b) + // expected-warning {{comparison of integers of different signs}}
+ (A < (unsigned char) b) + // expected-warning {{comparison of integers of different signs}}
+ ((long) A < b) +
+ ((int) A < b) +
+ ((short) A < b) +
+ ((signed char) A < b) +
+ ((long) A < (unsigned long) b) +
+ ((int) A < (unsigned int) b) +
+ ((short) A < (unsigned short) b) +
+ ((signed char) A < (unsigned char) b) +
+
+ // (a,B)
+ (a == (unsigned long) B) +
+ (a == (unsigned int) B) +
+ (a == (unsigned short) B) +
+ (a == (unsigned char) B) +
+ ((long) a == B) +
+ ((int) a == B) +
+ ((short) a == B) +
+ ((signed char) a == B) +
+ ((long) a == (unsigned long) B) +
+ ((int) a == (unsigned int) B) +
+ ((short) a == (unsigned short) B) +
+ ((signed char) a == (unsigned char) B) +
+ (a < (unsigned long) B) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned int) B) +
+ (a < (unsigned short) B) +
+ (a < (unsigned char) B) +
+ ((long) a < B) +
+ ((int) a < B) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < B) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < B) + // expected-warning {{comparison of integers of different signs}}
+ ((long) a < (unsigned long) B) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < (unsigned int) B) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < (unsigned short) B) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < (unsigned char) B) + // expected-warning {{comparison of integers of different signs}}
+
+ // (C,b)
+ (C == (unsigned long) b) +
+ (C == (unsigned int) b) +
+ (C == (unsigned short) b) +
+ (C == (unsigned char) b) +
+ ((long) C == b) +
+ ((int) C == b) +
+ ((short) C == b) +
+ ((signed char) C == b) +
+ ((long) C == (unsigned long) b) +
+ ((int) C == (unsigned int) b) +
+ ((short) C == (unsigned short) b) +
+ ((signed char) C == (unsigned char) b) +
+ (C < (unsigned long) b) +
+ (C < (unsigned int) b) +
+ (C < (unsigned short) b) + // expected-warning {{comparison of integers of different signs}}
+ (C < (unsigned char) b) + // expected-warning {{comparison of integers of different signs}}
+ ((long) C < b) +
+ ((int) C < b) +
+ ((short) C < b) +
+ ((signed char) C < b) +
+ ((long) C < (unsigned long) b) +
+ ((int) C < (unsigned int) b) +
+ ((short) C < (unsigned short) b) +
+ ((signed char) C < (unsigned char) b) +
+
+ // (a,C)
+ (a == (unsigned long) C) +
+ (a == (unsigned int) C) +
+ (a == (unsigned short) C) +
+ (a == (unsigned char) C) +
+ ((long) a == C) +
+ ((int) a == C) +
+ ((short) a == C) +
+ ((signed char) a == C) +
+ ((long) a == (unsigned long) C) +
+ ((int) a == (unsigned int) C) +
+ ((short) a == (unsigned short) C) +
+ ((signed char) a == (unsigned char) C) +
+ (a < (unsigned long) C) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned int) C) +
+ (a < (unsigned short) C) +
+ (a < (unsigned char) C) +
+ ((long) a < C) +
+ ((int) a < C) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < C) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < C) + // expected-warning {{comparison of integers of different signs}}
+ ((long) a < (unsigned long) C) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < (unsigned int) C) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < (unsigned short) C) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < (unsigned char) C) + // expected-warning {{comparison of integers of different signs}}
+
+ // (0x80000,b)
+ (0x80000 == (unsigned long) b) +
+ (0x80000 == (unsigned int) b) +
+ (0x80000 == (unsigned short) b) +
+ (0x80000 == (unsigned char) b) +
+ ((long) 0x80000 == b) +
+ ((int) 0x80000 == b) +
+ ((short) 0x80000 == b) +
+ ((signed char) 0x80000 == b) +
+ ((long) 0x80000 == (unsigned long) b) +
+ ((int) 0x80000 == (unsigned int) b) +
+ ((short) 0x80000 == (unsigned short) b) +
+ ((signed char) 0x80000 == (unsigned char) b) +
+ (0x80000 < (unsigned long) b) +
+ (0x80000 < (unsigned int) b) +
+ (0x80000 < (unsigned short) b) +
+ (0x80000 < (unsigned char) b) +
+ ((long) 0x80000 < b) +
+ ((int) 0x80000 < b) +
+ ((short) 0x80000 < b) +
+ ((signed char) 0x80000 < b) +
+ ((long) 0x80000 < (unsigned long) b) +
+ ((int) 0x80000 < (unsigned int) b) +
+ ((short) 0x80000 < (unsigned short) b) +
+ ((signed char) 0x80000 < (unsigned char) b) +
+
+ // (a,0x80000)
+ (a == (unsigned long) 0x80000) +
+ (a == (unsigned int) 0x80000) +
+ (a == (unsigned short) 0x80000) +
+ (a == (unsigned char) 0x80000) +
+ ((long) a == 0x80000) +
+ ((int) a == 0x80000) +
+ ((short) a == 0x80000) +
+ ((signed char) a == 0x80000) +
+ ((long) a == (unsigned long) 0x80000) +
+ ((int) a == (unsigned int) 0x80000) +
+ ((short) a == (unsigned short) 0x80000) +
+ ((signed char) a == (unsigned char) 0x80000) +
+ (a < (unsigned long) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+ (a < (unsigned int) 0x80000) +
+ (a < (unsigned short) 0x80000) +
+ (a < (unsigned char) 0x80000) +
+ ((long) a < 0x80000) +
+ ((int) a < 0x80000) +
+ ((short) a < 0x80000) +
+ ((signed char) a < 0x80000) +
+ ((long) a < (unsigned long) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+ ((int) a < (unsigned int) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+ ((short) a < (unsigned short) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+ ((signed char) a < (unsigned char) 0x80000) + // expected-warning {{comparison of integers of different signs}}
+
+ 10
+ ;
}
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