fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-01-07 08:40:11 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

r600g: Disable LLVM by default at runtime for graphics

Browse source 
For graphics, the LLVM compiler backend currently has many shortcomings
compared to the non-LLVM one. E.g. it can't handle geometry shaders yet,
but that's just the tip of the iceberg.

So building Mesa with --enable-r600-llvm-compiler is currently not
recommended for anyone who doesn't want to work on fixing those issues.
However, for protection of users who end up enabling it anyway for some
reason, let's disable the LLVM backend at runtime by default. It can be
enabled with the environment variable R600_DEBUG=llvm.

Cc: "10.1" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
(cherry picked from commit 7286739b9b)
This commit is contained in:
Michel Dänzer 2014-04-16 15:00:09 +09:00 • committed by Carl Worth
parent 4cd6530885
commit cda6610d85
3 changed files with 5 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
src/gallium/drivers/r600/r600_pipe.c
View file

@ -44,7 +44,7 @@
static const struct debug_named_value r600_debug_options[] = {
/* features */
#if defined(R600_USE_LLVM)
{ "nollvm", DBG_NO_LLVM, "Disable the LLVM shader compiler" },
{ "llvm", DBG_LLVM, "Enable the LLVM shader compiler" },
#endif
{ "nocpdma", DBG_NO_CP_DMA, "Disable CP DMA" },
{ "nodma", DBG_NO_ASYNC_DMA, "Disable asynchronous DMA" },
@ -591,8 +591,8 @@ struct pipe_screen *r600_screen_create(struct radeon_winsys *ws)
rscreen->b.debug_flags |= DBG_FS | DBG_VS | DBG_GS | DBG_PS | DBG_CS;
if (debug_get_bool_option("R600_HYPERZ", FALSE))
rscreen->b.debug_flags |= DBG_HYPERZ;
if (!debug_get_bool_option("R600_LLVM", TRUE))
rscreen->b.debug_flags |= DBG_NO_LLVM;
if (debug_get_bool_option("R600_LLVM", FALSE))
rscreen->b.debug_flags |= DBG_LLVM;
if (rscreen->b.family == CHIP_UNKNOWN) {
fprintf(stderr, "r600: Unknown chipset 0x%04X\n", rscreen->b.info.pci_id);

2
src/gallium/drivers/r600/r600_pipe.h
View file

@ -195,7 +195,7 @@ struct r600_gs_rings_state {
/* This must start from 16. */
/* features */
#define DBG_NO_LLVM (1 << 17)
#define DBG_LLVM (1 << 17)
#define DBG_NO_CP_DMA (1 << 18)
#define DBG_NO_ASYNC_DMA (1 << 19)
/* shader backend */

2
src/gallium/drivers/r600/r600_shader.c
View file

@ -1521,7 +1521,7 @@ static int r600_shader_from_tgsi(struct r600_context *rctx,
bool pos_emitted = false;
#ifdef R600_USE_LLVM
use_llvm = !(rscreen->b.debug_flags & DBG_NO_LLVM);
use_llvm = rscreen->b.debug_flags & DBG_LLVM;
#endif
ctx.bc = &shader->bc;
ctx.shader = shader;