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nv50/ir: r63 is only 0 if we are using less than 63 registers

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It is advantageous to use r63 instead of r127 since r63 can fit into the
shorter encoding. However if we've RA'd over 63 registers, we must use
r127 as the replacement instead.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "11.0" <mesa-stable@lists.freedesktop.org>
This commit is contained in:
Ilia Mirkin 2015-09-10 03:49:36 -04:00
parent a072ef8748
commit 641eda0c79
1 changed files with 4 additions and 1 deletions
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5
src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nv50.cpp
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@ -202,7 +202,10 @@ NV50LegalizePostRA::visit(Function *fn)
Program *prog = fn->getProgram();
r63 = new_LValue(fn, FILE_GPR);
r63->reg.data.id = 63;
if (prog->maxGPR < 63)
r63->reg.data.id = 63;
else
r63->reg.data.id = 127;
// this is actually per-program, but we can do it all on visiting main()
std::list<Instruction *> *outWrites =