From: Jason Ekstrand Date: Thu, 16 Oct 2014 18:45:44 +0000 (-0700) Subject: i965/fs: Allow constant propagation between different types X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3a5c7e47fdcfb3e322c0756e960cbcf8403e4230;p=mesa.git i965/fs: Allow constant propagation between different types This will be needed for NIR because it is typeless and treats all constants as uint32 values and reinterprets them when they are used later. This commit allows those values to be properly propagated. Also, this helps some synmark shaders because it allows us to copy propagate a 0x00000000UD into a 0.0F in a load_payload, which then lets us combine 4 load_payloads. instructions in affected programs: 2288 -> 2144 (-6.29%) Reviewed-by: Matt Turner --- diff --git a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp index 611cff13846..70f417fd2a8 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp @@ -433,8 +433,7 @@ fs_visitor::try_constant_propagate(fs_inst *inst, acp_entry *entry) continue; assert(entry->dst.file == GRF); - if (inst->src[i].reg != entry->dst.reg || - inst->src[i].type != entry->dst.type) + if (inst->src[i].reg != entry->dst.reg) continue; /* Bail if inst is reading a range that isn't contained in the range @@ -454,6 +453,7 @@ fs_visitor::try_constant_propagate(fs_inst *inst, acp_entry *entry) fs_reg val = entry->src; val.effective_width = inst->src[i].effective_width; + val.type = inst->src[i].type; switch (inst->opcode) { case BRW_OPCODE_MOV: