nv50/ir: start LocalCSE with getFirst to merge PHI instructions

total instructions in shared programs : 3499888 -> 3499445 (-0.01%)
total gprs used in shared programs    : 453866 -> 453803 (-0.01%)
total local used in shared programs   : 21621 -> 21621 (0.00%)
total bytes used in shared programs   : 32078952 -> 32074936 (-0.01%)

                local        gpr       inst      bytes
    helped           0          39         119         119
      hurt           0           0           0           0

Signed-off-by: Karol Herbst <karolherbst@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
index 8494c88..28b5985 100644 (file)
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
@@ -3323,7 +3323,7 @@ LocalCSE::visit(BasicBlock *bb)
       for (ir = bb->getFirst(); ir; ir = ir->next)
          ir->serial = serial++;
 
-      for (ir = bb->getEntry(); ir; ir = next) {
+      for (ir = bb->getFirst(); ir; ir = next) {
          int s;
          Value *src = NULL;