shader: fix conversion for return type of various bit operations

findLSB, findMSB, and countBits always return a signed integer

Fixes:

    dEQP-GLES31.functional.shaders.builtin_functions.uniform.findLSBMinusOne.*
    dEQP-GLES31.functional.shaders.builtin_functions.integer.findmsb.*
    dEQP-GLES31.functional.shaders.builtin_functions.integer.bitcount.*

    Changes resulting from the discussion on mesa-dev with
    Roland Schneidegger:
    v2: Set values in infer_(src|dst)_type only
    v3: Set values in the common infer_type code path, and only add
        the source type for UMSB

Signed-off-by: Gert Wollny gert.wollny@collabora.com
Reviewed-by: Dave Airlie <airlied@redhat.com>

src/gallium/auxiliary/tgsi/tgsi_info.c

@@ -351,9 +351,6 @@ tgsi_opcode_infer_type( uint opcode )
    case TGSI_OPCODE_UBFE:
    case TGSI_OPCODE_BFI:
    case TGSI_OPCODE_BREV:
-   case TGSI_OPCODE_POPC:
-   case TGSI_OPCODE_LSB:
-   case TGSI_OPCODE_UMSB:
    case TGSI_OPCODE_D2U:
    case TGSI_OPCODE_CLOCK:
       return TGSI_TYPE_UNSIGNED;
@@ -384,6 +381,9 @@ tgsi_opcode_infer_type( uint opcode )
    case TGSI_OPCODE_DSLT:
    case TGSI_OPCODE_DSNE:
    case TGSI_OPCODE_D2I:
+   case TGSI_OPCODE_LSB:
+   case TGSI_OPCODE_POPC:
+   case TGSI_OPCODE_UMSB:
       return TGSI_TYPE_SIGNED;
    case TGSI_OPCODE_DADD:
    case TGSI_OPCODE_DABS:
@@ -432,6 +432,7 @@ tgsi_opcode_infer_src_type( uint opcode )
    case TGSI_OPCODE_SAMPLE_I:
    case TGSI_OPCODE_SAMPLE_I_MS:
    case TGSI_OPCODE_UMUL_HI:
+   case TGSI_OPCODE_UMSB:
       return TGSI_TYPE_UNSIGNED;
    case TGSI_OPCODE_IMUL_HI:
    case TGSI_OPCODE_I2F: