From 68b3014cd3a1018a95ea5dec579fb7db067f35ba Mon Sep 17 00:00:00 2001 From: Richard Smith Date: Tue, 9 Oct 2012 19:34:32 +0000 Subject: Add a runtime diagnostics library for Clang's -fcatch-undefined-behavior. llvm-svn: 165533 --- compiler-rt/lib/ubsan/lit_tests/Integer/mul-overflow.cpp | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 compiler-rt/lib/ubsan/lit_tests/Integer/mul-overflow.cpp (limited to 'compiler-rt/lib/ubsan/lit_tests/Integer/mul-overflow.cpp') diff --git a/compiler-rt/lib/ubsan/lit_tests/Integer/mul-overflow.cpp b/compiler-rt/lib/ubsan/lit_tests/Integer/mul-overflow.cpp new file mode 100644 index 00000000000..1ba968da52c --- /dev/null +++ b/compiler-rt/lib/ubsan/lit_tests/Integer/mul-overflow.cpp @@ -0,0 +1,14 @@ +// RUN: %clang -fcatch-undefined-behavior %s -o %t && %t 2>&1 | FileCheck %s + +#include + +int main() { + // These promote to 'int'. + (void)(int8_t(-2) * int8_t(0x7f)); + (void)(int16_t(0x7fff) * int16_t(0x7fff)); + (void)(uint16_t(0xffff) * int16_t(0x7fff)); + (void)(uint16_t(0xffff) * uint16_t(0x8000)); + + // CHECK: mul-overflow.cpp:13:27: fatal error: signed integer overflow: 65535 * 32769 cannot be represented in type 'int' + (void)(uint16_t(0xffff) * uint16_t(0x8001)); +} -- cgit v1.2.3