gallium: add PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY

Drivers with good compilers don't need aggressive optimizations before TGSI.

Reviewed-by: Eric Anholt <eric@anholt.net>

src/gallium/docs/source/screen.rst

@@ -366,6 +366,9 @@ The integer capabilities:
   ARB_transform_feedback3.
 * ``PIPE_CAP_TGSI_CAN_READ_OUTPUTS``: Whether every TGSI shader stage can read
   from the output file.
+* ``PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY``: Tell the GLSL compiler to use
+  the minimum amount of optimizations just to be able to do all the linking
+  and lowering.
 
 
 .. _pipe_capf:

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -295,6 +295,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 	case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 	case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
+        case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 		return 0;
 
 	case PIPE_CAP_MAX_VIEWPORTS:

src/gallium/drivers/i915/i915_screen.c

@@ -296,6 +296,7 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
    case PIPE_CAP_NATIVE_FENCE_FD:
+   case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
       return 0;
 
    case PIPE_CAP_MAX_VIEWPORTS:

src/gallium/drivers/ilo/ilo_screen.c

@@ -519,6 +519,7 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
    case PIPE_CAP_NATIVE_FENCE_FD:
+   case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -340,6 +340,7 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
    case PIPE_CAP_NATIVE_FENCE_FD:
+   case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
       return 0;
    }
    /* should only get here on unhandled cases */

src/gallium/drivers/nouveau/nv30/nv30_screen.c

@@ -205,6 +205,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
    case PIPE_CAP_NATIVE_FENCE_FD:
+   case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/nouveau/nv50/nv50_screen.c

@@ -257,6 +257,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
    case PIPE_CAP_NATIVE_FENCE_FD:
+   case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/nouveau/nvc0/nvc0_screen.c

@@ -276,6 +276,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
    case PIPE_CAP_NATIVE_FENCE_FD:
+   case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/r300/r300_screen.c

@@ -227,6 +227,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
         case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
         case PIPE_CAP_NATIVE_FENCE_FD:
+        case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
             return 0;
 
         /* SWTCL-only features. */

src/gallium/drivers/r600/r600_pipe.c

@@ -376,6 +376,7 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 	case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 	case PIPE_CAP_NATIVE_FENCE_FD:
+        case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 		return 0;
 
 	case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:

src/gallium/drivers/radeonsi/si_pipe.c

@@ -413,6 +413,7 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_CULL_DISTANCE:
 	case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 	case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
+        case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 		return 1;
 
 	case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:

src/gallium/drivers/softpipe/sp_screen.c

@@ -290,6 +290,7 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
    case PIPE_CAP_NATIVE_FENCE_FD:
+   case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
       return 0;
    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
       return 4;

src/gallium/drivers/svga/svga_screen.c

@@ -421,6 +421,7 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
+   case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
       return 0;
    }
 

src/gallium/drivers/swr/swr_screen.cpp

@@ -318,6 +318,7 @@ swr_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
    case PIPE_CAP_NATIVE_FENCE_FD:
+   case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/vc4/vc4_screen.c

@@ -241,6 +241,7 @@ vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
         case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
         case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
         case PIPE_CAP_NATIVE_FENCE_FD:
+        case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
                 return 0;
 
                 /* Stream output. */

src/gallium/drivers/virgl/virgl_screen.c

@@ -251,6 +251,7 @@ virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
+   case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
       return 0;
    case PIPE_CAP_VENDOR_ID:
       return 0x1af4;

src/gallium/include/pipe/p_defines.h

@@ -743,6 +743,7 @@ enum pipe_cap
    PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS,
    PIPE_CAP_TGSI_CAN_READ_OUTPUTS,
    PIPE_CAP_NATIVE_FENCE_FD,
+   PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)