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i965/fs: Fix copy propagation with smearing.

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We were correctly relaying the smear from MOV's src, but if the MOV
didn't do a smear, we don't want to smash the smear value from the
instruction being propagated into.  Prevents a regression in the
upcoming UBO change.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
NOTE: This is a candidate for the 9.1 branch.
This commit is contained in:
Eric Anholt 2013-02-15 21:10:06 -08:00
parent de7cb1cff3
commit 49bdebad38
1 changed files with 2 additions and 1 deletions
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3
src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
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@ -223,7 +223,8 @@ fs_visitor::try_copy_propagate(fs_inst *inst, int arg, acp_entry *entry)
inst->src[arg].file = entry->src.file;
inst->src[arg].reg = entry->src.reg;
inst->src[arg].reg_offset = entry->src.reg_offset;
inst->src[arg].smear = entry->src.smear;
if (entry->src.smear != -1)
inst->src[arg].smear = entry->src.smear;
if (!inst->src[arg].abs) {
inst->src[arg].abs = entry->src.abs;