From: Kenneth Graunke Date: Wed, 28 Aug 2013 18:16:27 +0000 (-0700) Subject: i965/vs: Detect GRF sources in split_virtual_grfs send-from-GRF code. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4e3d1712a223f9f0b4ff4a34b9b5447a92877347;p=mesa.git i965/vs: Detect GRF sources in split_virtual_grfs send-from-GRF code. It is incorrect to assume that src[0] of a SEND-from-GRF opcode is the GRF. VS_OPCODE_PULL_CONSTANT_LOAD_GEN7 uses an IMM as src[0], and stores the GRF as src[1]. To be safe, loop over all the source registers and mark any GRFs. We probably won't ever have more than one, but it's simpler to just check all three rather than attempting to bail early. Fixes assertion failures in Unigine Sanctuary since we started making register allocation rely on split_virtual_grfs working. (The register classes were actually sufficient, we were just interpreting an IMM as a virtual GRF number.) Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=68637 Signed-off-by: Kenneth Graunke Reviewed-by: Eric Anholt Cc: mesa-stable@lists.freedesktop.org --- diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/i965/brw_vec4.cpp index ab472b009ec..2c1f54158b7 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp @@ -1034,10 +1034,14 @@ vec4_visitor::split_virtual_grfs() vec4_instruction *inst = (vec4_instruction *)node; /* If there's a SEND message loading from a GRF on gen7+, it needs to be - * contiguous. Assume that the GRF for the SEND is always in src[0]. + * contiguous. */ if (inst->is_send_from_grf()) { - split_grf[inst->src[0].reg] = false; + for (int i = 0; i < 3; i++) { + if (inst->src[i].file == GRF) { + split_grf[inst->src[i].reg] = false; + } + } } }