[Bug target/103784] suboptimal code for returning bool value on target ppc

[aagarwa at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103784

--- Comment #16 from Ajit Kumar Agarwal <aagarwa at gcc dot gnu.org> ---
This patch https://gcc.gnu.org/pipermail/gcc-patches/2023-July/624751.html

removes the zero extension from the below testcase that has different cfg, My
patch is not based on any CFG shape but it is general valid for all the CFG.

Testcase from Surya.
#include <stdbool.h>

bool glob1;
bool glob2;

bool foo (int a, bool d)
{
  bool c;
  if (a > 2)
    c = glob1 & glob2;
  else
    c = glob1 | glob2;
  return c^d;
}