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intel/compiler/fs: Add live interval validation pass

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This could be improved somewhat with additional validation of the
calculated live in/out sets and by checking that the calculated live
intervals are minimal (which isn't strictly necessary to guarantee the
correctness of the program).  This should be good enough though to
catch accidental use of stale liveness results due to missing or
incorrect analysis invalidation.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4012>
This commit is contained in:
Francisco Jerez
2016-03-09 22:41:31 -08:00
committed by Matt Turner
parent a9cdc14f60
commit 24535604aa
2 changed files with 43 additions and 0 deletions
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src/intel/compiler/brw_fs_live_variables.h
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@@ -81,6 +81,8 @@ public:
fs_live_variables(const backend_shader *s);
~fs_live_variables();
bool validate(const backend_shader *s) const;
bool vars_interfere(int a, int b) const;
bool vgrfs_interfere(int a, int b) const;
int var_from_reg(const fs_reg &reg) const