radeonsi: export "undef" values for undefined PS outputs

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index e08a07618d883b38e3a708cd4e70f508bc6255b9..73a34ac254e6d55825dc49bb08aadae94ad87123 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -1323,11 +1323,12 @@ static void si_llvm_init_export_args(struct lp_build_tgsi_context *bld_base,
                                                    LLVMInt32TypeInContext(base->gallivm->context),
                                                    pack_args, 2,
                                                    LLVMReadNoneAttribute | LLVMNoUnwindAttribute);
-                       args[chan + 7] = args[chan + 5] =
+                       args[chan + 5] =
                                LLVMBuildBitCast(base->gallivm->builder,
                                                 packed,
                                                 LLVMFloatTypeInContext(base->gallivm->context),
                                                 "");
+                       args[chan + 7] = base->undef;
                }
        } else
                memcpy(&args[5], values, sizeof(values[0]) * 4);
@@ -2119,10 +2120,10 @@ static void si_export_mrt_z(struct lp_build_tgsi_context *bld_base,
        args[3] = lp_build_const_int32(base->gallivm, V_008DFC_SQ_EXP_MRTZ);
 
        args[4] = uint->zero; /* COMP flag */
-       args[5] = base->zero; /* R, depth */
-       args[6] = base->zero; /* G, stencil test value[0:7], stencil op value[8:15] */
-       args[7] = base->zero; /* B, sample mask */
-       args[8] = base->zero; /* A, alpha to mask */
+       args[5] = base->undef; /* R, depth */
+       args[6] = base->undef; /* G, stencil test value[0:7], stencil op value[8:15] */
+       args[7] = base->undef; /* B, sample mask */
+       args[8] = base->undef; /* A, alpha to mask */
 
        if (depth) {
                args[5] = depth;
@@ -2173,10 +2174,10 @@ static void si_llvm_emit_fs_epilogue(struct lp_build_tgsi_context * bld_base)
                args[2] = uint->one; /* DONE bit */
                args[3] = lp_build_const_int32(base->gallivm, V_008DFC_SQ_EXP_MRT);
                args[4] = uint->zero; /* COMPR flag (0 = 32-bit export) */
-               args[5] = uint->zero; /* R */
-               args[6] = uint->zero; /* G */
-               args[7] = uint->zero; /* B */
-               args[8] = uint->zero; /* A */
+               args[5] = uint->undef; /* R */
+               args[6] = uint->undef; /* G */
+               args[7] = uint->undef; /* B */
+               args[8] = uint->undef; /* A */
 
                lp_build_intrinsic(base->gallivm->builder, "llvm.SI.export",
                                   LLVMVoidTypeInContext(base->gallivm->context),