From: Marek Olšák Date: Wed, 2 May 2018 00:16:19 +0000 (-0400) Subject: radeonsi/gfx9: work around a GPU hang due to broken indirect indexing in LLVM X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=597b9e881083533b987dbcbb8f679ca1eefff974;p=mesa.git radeonsi/gfx9: work around a GPU hang due to broken indirect indexing in LLVM Fixes: 6d19120da85 "radeonsi/gfx9: workaround for INTERP with indirect indexing" Cc: 18.1 Reviewed-by: Nicolai Hähnle --- diff --git a/src/gallium/drivers/radeonsi/si_get.c b/src/gallium/drivers/radeonsi/si_get.c index d4e0eab187d..c31ab43cb42 100644 --- a/src/gallium/drivers/radeonsi/si_get.c +++ b/src/gallium/drivers/radeonsi/si_get.c @@ -494,6 +494,15 @@ static int si_get_shader_param(struct pipe_screen* pscreen, !sscreen->llvm_has_working_vgpr_indexing) return 0; + /* Doing indirect indexing on GFX9 with LLVM 6.0 hangs. + * This means we don't support INTERP instructions with + * indirect indexing on inputs. + */ + if (shader == PIPE_SHADER_FRAGMENT && + !sscreen->llvm_has_working_vgpr_indexing && + HAVE_LLVM < 0x0700) + return 0; + /* TCS and TES load inputs directly from LDS or offchip * memory, so indirect indexing is always supported. * PS has to support indirect indexing, because we can't