[AMDGPU] Check for all meta instrs in GCNRegBankReassign
It used to work correctly even with a KILL, but there is
no reason to consider meta instructions since they do not
create real HW uses.
Differential Revision: https://reviews.llvm.org/D100135
diff --git a/llvm/lib/Target/AMDGPU/GCNRegBankReassign.cpp b/llvm/lib/Target/AMDGPU/GCNRegBankReassign.cpp
index 0e7041c..085796d 100644
--- a/llvm/lib/Target/AMDGPU/GCNRegBankReassign.cpp
+++ b/llvm/lib/Target/AMDGPU/GCNRegBankReassign.cpp
@@ -397,7 +397,7 @@
unsigned StallCycles = 0;
unsigned UsedBanks = 0;
- if (MI.isDebugValue())
+ if (MI.isMetaInstruction())
return std::make_pair(StallCycles, UsedBanks);
if (!(Mode & RM_SGPR) &&
diff --git a/llvm/test/CodeGen/AMDGPU/regbank-reassign.mir b/llvm/test/CodeGen/AMDGPU/regbank-reassign.mir
index f904763..df057da 100644
--- a/llvm/test/CodeGen/AMDGPU/regbank-reassign.mir
+++ b/llvm/test/CodeGen/AMDGPU/regbank-reassign.mir
@@ -572,3 +572,40 @@
%4 = V_ADD_F64_e64 0, %0.sub0_sub1:vreg_128, 0, %2:vreg_64, 0, 0, implicit $mode, implicit $exec
S_ENDPGM 0
...
+
+# GCN-LABEL: dbg_value_v1_v5{{$}}
+# GCN: renamable $vgpr1 = IMPLICIT_DEF
+# GCN: renamable $vgpr5 = IMPLICIT_DEF
+---
+name: dbg_value_v1_v5
+tracksRegLiveness: true
+registers:
+ - { id: 0, class: vgpr_32, preferred-register: '$vgpr1' }
+ - { id: 1, class: vgpr_32, preferred-register: '$vgpr5' }
+ - { id: 2, class: vgpr_32 }
+body: |
+ bb.0:
+ %0 = IMPLICIT_DEF
+ %1 = IMPLICIT_DEF
+ DBG_VALUE debug-use %1, debug-use %0
+ S_ENDPGM 0, implicit %0, implicit %1
+...
+
+# GCN-LABEL: kill_v1_v5{{$}}
+# GCN: renamable $vgpr1 = IMPLICIT_DEF
+# GCN: renamable $vgpr5 = IMPLICIT_DEF
+# GCN: KILL killed renamable $vgpr5, killed renamable $vgpr1
+---
+name: kill_v1_v5
+tracksRegLiveness: true
+registers:
+ - { id: 0, class: vgpr_32, preferred-register: '$vgpr1' }
+ - { id: 1, class: vgpr_32, preferred-register: '$vgpr5' }
+ - { id: 2, class: vgpr_32 }
+body: |
+ bb.0:
+ %0 = IMPLICIT_DEF
+ %1 = IMPLICIT_DEF
+ KILL %1, %0
+ S_ENDPGM 0
+...
