diff options
| author | Marek Olšák <marek.olsak@amd.com> | 2015-10-10 02:40:20 +0200 |
|---|---|---|
| committer | Marek Olšák <marek.olsak@amd.com> | 2015-10-17 21:40:03 +0200 |
| commit | 6660ca7121183b5ce777b1bd3613afdd19640b13 (patch) | |
| tree | 757918418707fd95186e299be6faf20b1928b248 /src/gallium | |
| parent | 529c5e77402012aa0c0a11ee71a1a65e51edb496 (diff) | |
radeonsi: initialize output, temp, and address registers to "undef"
This removes "v_mov v0, 0" which typically occurs before exports.
Totals:
SGPRS: 345216 -> 344552 (-0.19 %)
VGPRS: 197684 -> 197132 (-0.28 %)
Code Size: 7390408 -> 7375376 (-0.20 %) bytes
LDS: 91 -> 91 (0.00 %) blocks
Scratch: 1842176 -> 1679360 (-8.84 %) bytes per wave
Totals from affected shaders:
SGPRS: 101336 -> 100672 (-0.66 %)
VGPRS: 53920 -> 53368 (-1.02 %)
Code Size: 2170176 -> 2155144 (-0.69 %) bytes
LDS: 2 -> 2 (0.00 %) blocks
Scratch: 1015808 -> 852992 (-16.03 %) bytes per wave
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
Diffstat (limited to 'src/gallium')
| -rw-r--r-- | src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c b/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c index 2e9a0135647..f548d1ac36f 100644 --- a/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c +++ b/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c @@ -272,6 +272,15 @@ static LLVMValueRef fetch_system_value( return bitcast(bld_base, type, cval); } +static LLVMValueRef si_build_alloca_undef(struct gallivm_state *gallivm, + LLVMTypeRef type, + const char *name) +{ + LLVMValueRef ptr = lp_build_alloca(gallivm, type, name); + LLVMBuildStore(gallivm->builder, LLVMGetUndef(type), ptr); + return ptr; +} + static void emit_declaration( struct lp_build_tgsi_context * bld_base, const struct tgsi_full_declaration *decl) @@ -285,7 +294,7 @@ static void emit_declaration( for (idx = decl->Range.First; idx <= decl->Range.Last; idx++) { unsigned chan; for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) { - ctx->soa.addr[idx][chan] = lp_build_alloca( + ctx->soa.addr[idx][chan] = si_build_alloca_undef( &ctx->gallivm, ctx->soa.bld_base.uint_bld.elem_type, ""); } @@ -315,8 +324,9 @@ static void emit_declaration( for (idx = first; idx <= last; idx++) { for (i = 0; i < TGSI_NUM_CHANNELS; i++) { ctx->temps[idx * TGSI_NUM_CHANNELS + i] = - lp_build_alloca(bld_base->base.gallivm, bld_base->base.vec_type, - "temp"); + si_build_alloca_undef(bld_base->base.gallivm, + bld_base->base.vec_type, + "temp"); } } break; @@ -347,7 +357,8 @@ static void emit_declaration( unsigned chan; assert(idx < RADEON_LLVM_MAX_OUTPUTS); for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) { - ctx->soa.outputs[idx][chan] = lp_build_alloca(&ctx->gallivm, + ctx->soa.outputs[idx][chan] = si_build_alloca_undef( + &ctx->gallivm, ctx->soa.bld_base.base.elem_type, ""); } } |