i965/fs: don't propagate 64-bit immediates

They can only be used with 1-src instructions, which practically (since
we should've constant-propagated away all 1-src instructions with 64-bit
immediates in NIR) means that they must be kept in separate MOV's and
can't be propagated.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
index 2e8c84fa34e9e3550088c4127d35c859d09035ec..4d727c131d5d956d60f4ede2a43f04bc20a366af 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
@@ -508,6 +508,8 @@ fs_visitor::try_constant_propagate(fs_inst *inst, acp_entry *entry)
 
    if (entry->src.file != IMM)
       return false;
+   if (type_sz(entry->src.type) > 4)
+      return false;
    if (entry->saturate)
       return false;