More for PR12457: fix handling of __builtin_isinf_sign and test.

llvm-svn: 183890

2 files changed, 8 insertions, 1 deletions

diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index ad4816a24f8..96550f989ad 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -5761,7 +5761,7 @@ bool IntExprEvaluator::VisitCallExpr(const CallExpr *E) {
 
   case Builtin::BI__builtin_isinf_sign: {
     APFloat Val(0.0);
-    return EvaluateFloat(E->getArg(5), Val, Info) &&
+    return EvaluateFloat(E->getArg(0), Val, Info) &&
            Success(Val.isInfinity() ? (Val.isNegative() ? -1 : 1) : 0, E);
   }
 
diff --git a/clang/test/Sema/constant-builtins-2.c b/clang/test/Sema/constant-builtins-2.c
index 7da899b62e3..0e63ad3e8b7 100644
--- a/clang/test/Sema/constant-builtins-2.c
+++ b/clang/test/Sema/constant-builtins-2.c
@@ -48,6 +48,13 @@ char classify_denorm2 [__builtin_fpclassify(-1, -1, -1, +1, -1, -1e-308)];
 char classify_zero    [__builtin_fpclassify(-1, -1, -1, -1, +1, 0.0)];
 char classify_neg_zero[__builtin_fpclassify(-1, -1, -1, -1, +1, -0.0)];
 
+char isinf_sign_noninf1[__builtin_isinf_sign(-0.0) == 0 ? 1 : -1];
+char isinf_sign_noninf2[__builtin_isinf_sign(1e307) == 0 ? 1 : -1];
+char isinf_sign_noninf3[__builtin_isinf_sign(__builtin_nan("")) == 0 ? 1 : -1];
+char isinf_sign_noninf4[__builtin_isinf_sign(-436.) == 0 ? 1 : -1];
+char isinf_sign_inf    [__builtin_isinf_sign(__builtin_inf()) == 1 ? 1 : -1];
+char isinf_sign_neg_inf[__builtin_isinf_sign(-__builtin_inf()) == -1 ? 1 : -1];
+
 //double       g19 = __builtin_powi(2.0, 4);
 //float        g20 = __builtin_powif(2.0f, 4);
 //long double  g21 = __builtin_powil(2.0L, 4);