[PATCH][PR 87633] Do not generate unordered integer comparisons

[Yuri Gribov]

Hi all,

My recent patch which replaced
  (float_type)int_var1 CMP (float_type)int_var2
with
  int_var1 CMP int_var2
may generate unordered comparisons of integer values which are both
unnecessary and may also upset later passes.

This patch fixes the problem and bootstraps without regressions on
x86_64-linux-gnu.

Ok to commit?

-Yury

pr87633-1.patch
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