Karl-Johan Karlsson ff14585eb0 [builtins] Avoid undefined behavior when calculating absolute value in floatsidf.c and floatsisf.c ...

When compiling compiler-rt with -fsanitize=undefined and running testcases you
end up with the following warning:

UBSan: floatsidf.c:32:9: negation of -2147483648 cannot be represented in type 'si_int' (aka 'long'); cast to an unsigned type to negate this value to itself

The same kind of pattern exists in floatsisf.c

This was found in an out of tree target.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D146123

2023-08-23 08:57:18 +02:00

1.5 KiB

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