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nv50/ir: allow immediate 0 to be loaded anywhere

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There's a post-RA fixup to replace 0's with $r63 (or $r127 if too many
regs are used), so just as nvc0, let an immediate 0 be loaded anywhere.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
This commit is contained in:
Ilia Mirkin 2015-12-01 15:01:11 -05:00
parent 043d427538
commit 52a800a687
1 changed files with 6 additions and 0 deletions
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6
src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp
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@ -268,6 +268,12 @@ TargetNV50::insnCanLoad(const Instruction *i, int s,
{
DataFile sf = ld->src(0).getFile();
// immediate 0 can be represented by GPR $r63/$r127
if (sf == FILE_IMMEDIATE && ld->getSrc(0)->reg.data.u64 == 0)
return (!i->isPseudo() &&
!i->asTex() &&
i->op != OP_EXPORT && i->op != OP_STORE);
if (sf == FILE_IMMEDIATE && (i->predSrc >= 0 || i->flagsDef >= 0))
return false;
if (s >= opInfo[i->op].srcNr)