From: Connor Abbott <[email protected]>
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.
---
src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp | 2 ++
1 file changed, 2 insertions(+)
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 ffab0a8..950323a 100644
--- 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;
--
2.5.0
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