[clang] effd6dd - [Clang][Sema] Add a missing regression test about Wliteral-range

[Jun Zhang via cfe-commits]

Author: Jun Zhang
Date: 2022-02-15T09:46:42+08:00
New Revision: effd6dd63a65f201b4f8f1be6a025b0608604449

URL: https://github.com/llvm/llvm-project/commit/effd6dd63a65f201b4f8f1be6a025b0608604449
DIFF: https://github.com/llvm/llvm-project/commit/effd6dd63a65f201b4f8f1be6a025b0608604449.diff

LOG: [Clang][Sema] Add a missing regression test about Wliteral-range

This patch adds a missing test, covering the different kinds of floating-point
literals, like hexadecimal floats, and testing extreme cases & normal cases.

Differential Revision: https://reviews.llvm.org/D119528

Added: 
    clang/test/Sema/warn-literal-range.c

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/clang/test/Sema/warn-literal-range.c b/clang/test/Sema/warn-literal-range.c
new file mode 100644
index 0000000000000..8014b058bd886
--- /dev/null
+++ b/clang/test/Sema/warn-literal-range.c
@@ -0,0 +1,37 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c99 -verify %s
+
+float f0 = 0.42f; // no-warning
+
+float f1 = 1.4E-46f; // expected-warning {{magnitude of floating-point constant too small for type 'float'; minimum is 1.40129846E-45}}
+
+float f2 = 3.4E+39f; // expected-warning {{magnitude of floating-point constant too large for type 'float'; maximum is 3.40282347E+38}}
+
+float f3 = 0x4.2p42f; // no-warning
+
+float f4 = 0x0.42p-1000f; // expected-warning {{magnitude of floating-point constant too small for type 'float'; minimum is 1.40129846E-45}}
+
+float f5 = 0x0.42p+1000f; // expected-warning {{magnitude of floating-point constant too large for type 'float'; maximum is 3.40282347E+38}}
+
+double d0 = 0.42; // no-warning
+
+double d1 = 3.6E-4952; // expected-warning {{magnitude of floating-point constant too small for type 'double'; minimum is 4.9406564584124654E-324}}
+
+double d2 = 1.7E+309; // expected-warning {{magnitude of floating-point constant too large for type 'double'; maximum is 1.7976931348623157E+308}}
+
+double d3 = 0x0.42p42; // no-warning
+
+double d4 = 0x0.42p-4200; // expected-warning {{magnitude of floating-point constant too small for type 'double'; minimum is 4.9406564584124654E-324}}
+
+double d5 = 0x0.42p+4200; // expected-warning {{magnitude of floating-point constant too large for type 'double'; maximum is 1.7976931348623157E+308}}
+
+long double ld0 = 0.42L; // no-warning
+
+long double ld1 = 3.6E-4952L; // expected-warning {{magnitude of floating-point constant too small for type 'long double'; minimum is 3.64519953188247460253E-4951}}
+
+long double ld2 = 1.2E+4932L; // expected-warning {{magnitude of floating-point constant too large for type 'long double'; maximum is 1.18973149535723176502E+4932}}
+
+long double ld3 = 0x0.42p42L; // no-warning
+
+long double ld4 = 0x0.42p-42000L; // expected-warning {{magnitude of floating-point constant too small for type 'long double'; minimum is 3.64519953188247460253E-4951}}
+
+long double ld5 = 0x0.42p+42000L; // expected-warning {{magnitude of floating-point constant too large for type 'long double'; maximum is 1.18973149535723176502E+4932}}