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nir: fix a bug with constant folding non-per-component instructions

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Before, we were only copying the first N channels, where N is the size
of the SSA destination, which is fine for per-component instructions,
but non-per-component instructions like fdot3 can have more source
components than destination components. Fix this using the helper
function introduced in the last patch.

v2: use new helper name

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Signed-off-by: Connor Abbott <cwabbott0@gmail.com>
This commit is contained in:
Connor Abbott 2015-01-25 11:47:53 -05:00
parent 816f0515a2
commit f1a9252def
1 changed files with 2 additions and 1 deletions
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3
src/glsl/nir/nir_opt_constant_folding.c
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@ -56,7 +56,8 @@ constant_fold_alu_instr(nir_alu_instr *instr, void *mem_ctx)
return false;
nir_load_const_instr* load_const = nir_instr_as_load_const(src_instr);
for (unsigned j = 0; j < instr->dest.dest.ssa.num_components; j++) {
for (unsigned j = 0; j < nir_ssa_alu_instr_src_components(instr, i);
j++) {
src[i].u[j] = load_const->value.u[instr->src[i].swizzle[j]];
}