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nv50/ir: allow load propagation when flags are defined

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The old condition disallowed load propagation any time flags were
defined, even with e.g. set and a constbuf reference. The new condition
disallows it only with immediate propagation. (There are no opcodes that
set the condition flag and have an immediate argument.)

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
This commit is contained in:
Ilia Mirkin 2014-05-03 00:26:14 -04:00
parent 83b900fd0a
commit 5a40fe03f7
1 changed files with 4 additions and 3 deletions
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7
src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
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@ -275,9 +275,10 @@ TargetNV50::insnCanLoad(const Instruction *i, int s,
return false;
// NOTE: don't rely on flagsDef
for (int d = 0; i->defExists(d); ++d)
if (i->def(d).getFile() == FILE_FLAGS)
return false;
if (sf == FILE_IMMEDIATE)
for (int d = 0; i->defExists(d); ++d)
if (i->def(d).getFile() == FILE_FLAGS)
return false;
unsigned mode = 0;