https://llvm.org/bugs/show_bug.cgi?id=23358
Bug ID: 23358
Summary: A Division by Zero does not generate a floating point
exception when optimizations are enabled
Product: clang
Version: 3.6
Hardware: PC
OS: MacOS X
Status: NEW
Severity: release blocker
Priority: P
Component: -New Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
The following program
#include <stdio.h>
#include <stdlib.h>
int main () {
int volatile l = 123;
int volatile v = (1 / (l - l));
printf ("Value of v is %d\n", v);
}
will not generate a floating point exception when compiled in -O1/-O2/-O3
optimization.
This starded when upgrading the latest Xcode (v6.3) from Apple:
cc --version
Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
Target: x86_64-apple-darwin14.3.0
Thread model: posix
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