Matt Arsenault c5fe075eaf AMDGPU: Use freeze poison instead of undef in alloca promotion (#131285) ...

Previously the value created to represent the uninitialized memory
of the alloca was undef. Use freeze poison instead. Enables some
optimization improvements (which need defeating in the limit tests),
but also a few regressions. Seems to leave behind dead code in some
cases too.

2025-03-18 17:27:02 +07:00

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