intel/fs/gen7: Fix fs_inst::flags_written() for SHADER_OPCODE_FIND_LIVE_CHANNEL.

We need to pass a width of 32 since the opcode bashes the whole f1.0
register on IVB.  This is unlikely to have caused problems since f1.0
is largely unused currently.  That's likely to change soon though,
even on platforms other than Gen7.

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Cc: 20.0 <mesa-stable@lists.freedesktop.org>

diff --git a/src/intel/compiler/brw_fs.cpp b/src/intel/compiler/brw_fs.cpp
index 855c99dcb9aae37b8f180a9af5743b117c7c7d76..d54fa7a640b3cf1d622070acba62e688026a8ceb 100644 (file)
--- a/src/intel/compiler/brw_fs.cpp
+++ b/src/intel/compiler/brw_fs.cpp
@@ -1086,9 +1086,10 @@ fs_inst::flags_written() const
                             opcode != BRW_OPCODE_CSEL &&
                             opcode != BRW_OPCODE_IF &&
                             opcode != BRW_OPCODE_WHILE)) ||
-       opcode == SHADER_OPCODE_FIND_LIVE_CHANNEL ||
        opcode == FS_OPCODE_FB_WRITE) {
       return flag_mask(this, 1);
+   } else if (opcode == SHADER_OPCODE_FIND_LIVE_CHANNEL) {
+      return flag_mask(this, 32);
    } else {
       return flag_mask(dst, size_written);
    }