AMDGPU/SI: Enable lanemask tracking in misched
Summary:
This results in higher register usage, but should make it easier for
the compiler to hide latency.
This pass is a prerequisite for some more scheduler improvements, and I
think the increase register usage with this patch is acceptable, because
when combined with the scheduler improvements, the total register usage
will decrease.
shader-db stats:
2382 shaders in 478 tests
Totals:
SGPRS: 48672 -> 49088 (0.85 %)
VGPRS: 34148 -> 34847 (2.05 %)
Code Size: 1285816 -> 1289128 (0.26 %) bytes
LDS: 28 -> 28 (0.00 %) blocks
Scratch: 492544 -> 573440 (16.42 %) bytes per wave
Max Waves: 6856 -> 6846 (-0.15 %)
Wait states: 0 -> 0 (0.00 %)
Depends on D18451
Reviewers: nhaehnle, arsenm
Subscribers: arsenm, llvm-commits
Differential Revision: http://reviews.llvm.org/D18452
llvm-svn: 264876
diff --git a/llvm/test/CodeGen/AMDGPU/captured-frame-index.ll b/llvm/test/CodeGen/AMDGPU/captured-frame-index.ll
index 6b70c93..7e2b98e 100644
--- a/llvm/test/CodeGen/AMDGPU/captured-frame-index.ll
+++ b/llvm/test/CodeGen/AMDGPU/captured-frame-index.ll
@@ -2,12 +2,10 @@
; GCN-LABEL: {{^}}stored_fi_to_lds:
; GCN: s_load_dword [[LDSPTR:s[0-9]+]]
-; GCN: v_mov_b32_e32 [[ZERO0:v[0-9]+]], 0{{$}}
; GCN: v_mov_b32_e32 [[ZERO1:v[0-9]+]], 0{{$}}
; GCN: buffer_store_dword v{{[0-9]+}}, [[ZERO1]]
-
+; GCN: v_mov_b32_e32 [[ZERO0:v[0-9]+]], 0{{$}}
; GCN: v_mov_b32_e32 [[VLDSPTR:v[0-9]+]], [[LDSPTR]]
-
; GCN: ds_write_b32 [[VLDSPTR]], [[ZERO0]]
define void @stored_fi_to_lds(float* addrspace(3)* %ptr) #0 {
%tmp = alloca float
@@ -19,7 +17,6 @@
; Offset is applied
; GCN-LABEL: {{^}}stored_fi_to_lds_2_small_objects:
; GCN: s_load_dword [[LDSPTR:s[0-9]+]]
-; GCN: v_mov_b32_e32 [[ZERO0:v[0-9]+]], 0{{$}}
; GCN: v_mov_b32_e32 [[ZERO1:v[0-9]+]], 0{{$}}
; GCN: buffer_store_dword v{{[0-9]+}}, [[ZERO1]]
@@ -27,6 +24,7 @@
; GCN: buffer_store_dword v{{[0-9]+}}, [[FI1]]
+; GCN-DAG: v_mov_b32_e32 [[ZERO0:v[0-9]+]], 0{{$}}
; GCN-DAG: v_mov_b32_e32 [[VLDSPTR:v[0-9]+]], [[LDSPTR]]
; GCN: ds_write_b32 [[VLDSPTR]], [[ZERO0]]