d1b7462849
Issue description from Matt's commite7c376ad: "var_range_end(v, n) loops over the n components of variable number v and finds the maximum value, giving the last use of any component of v. Therefore it expects v to correspond to the variable associated with the .x channel of the VGRF. var_from_reg() however returns the variable for the first channel of the VGRF, post-swizzle. So, if the last register had a swizzle with y, z, or w in the swizzle component, we would read out of bounds. For any other register, we would read liveness information from the next register. The fix is to convert the src_reg to a dst_reg in order to call the dst_reg version of var_from_reg() that doesn't consider the swizzle." Closes: #3003 Fixes:48dfb30f('intel/compiler: Move all live interval analysis results into vec4_live_variables') Reviewed-by: Matt Turner <mattst88@gmail.com> Signed-off-by: Andrii Simiklit <asimiklit.work@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4941>
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