From: Marek Olšák <marek.ol...@amd.com>
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
---
src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c | 19 +++++++++++++++----
1 file 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 2e9a013..f548d1a 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, "");
}
}
--
2.1.4
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