ac/llvm: fix demote inside conditional branches

The big comment explains it. v2: don't kill if subgroup ops are used Reviewed-by: Rhys Perry <pendingchaos02@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7586>
2020-09-20 22:50:52 -04:00
parent cb20d58f45
commit aa757f4f8c
3 changed files with 47 additions and 4 deletions
--- a/src/amd/llvm/ac_llvm_build.h
+++ b/src/amd/llvm/ac_llvm_build.h
@@ -118,6 +118,7 @@ struct ac_llvm_context {
    * False = demoted lanes
    */
   LLVMValueRef postponed_kill;
+   bool conditional_demote_seen;

   /* Since ac_nir_translate makes a local copy of ac_llvm_context, there
    * are two ac_llvm_contexts. Declare a pointer here, so that the control