http://llvm.org/bugs/show_bug.cgi?id=6050
Summary: floating-point operations have side effects
Product: new-bugs
Version: unspecified
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Floating-point instructions, such as add, sub, mul, and div, as well as math
library functions in -fno-math-errno mode, are considered to have no side
effects in LLVM. This is incorrect; they may set floating-point exception
flags, and they may trap if the processor is configured to trap on
floating-point exceptions.
As a consequence of this, these side effects may be reordered or eliminated by
the optimizer and codegen.
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