AMDGPU/GlobalISel: Implement select() for COPY
Reviewers: arsenm, nhaehnle
Reviewed By: nhaehnle
Subscribers: kzhuravl, wdng, yaxunl, rovka, kristof.beyls, dstuttard, tpr, t-tye, llvm-commits
Differential Revision: https://reviews.llvm.org/D46151
llvm-svn: 335315
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp b/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
index 27bd191..dde8fdc 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
@@ -528,8 +528,11 @@
bool AMDGPUInstructionSelector::select(MachineInstr &I,
CodeGenCoverage &CoverageInfo) const {
- if (!isPreISelGenericOpcode(I.getOpcode()))
+ if (!isPreISelGenericOpcode(I.getOpcode())) {
+ if (I.isCopy())
+ return selectCOPY(I);
return true;
+ }
switch (I.getOpcode()) {
default:
diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-copy.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-copy.mir
new file mode 100644
index 0000000..495acf6
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-copy.mir
@@ -0,0 +1,27 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=amdgcn -run-pass=instruction-select -verify-machineinstrs -global-isel %s -o - | FileCheck %s -check-prefixes=GCN
+
+--- |
+ define amdgpu_kernel void @copy(i32 addrspace(1)* %global0) {ret void}
+...
+---
+
+name: copy
+legalized: true
+regBankSelected: true
+
+
+body: |
+ bb.0:
+ liveins: $sgpr2_sgpr3
+ ; GCN-LABEL: name: copy
+ ; GCN: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY $sgpr2_sgpr3
+ ; GCN: [[COPY1:%[0-9]+]]:vreg_64 = COPY [[COPY]]
+ ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
+ ; GCN: FLAT_STORE_DWORD [[COPY1]], [[DEF]], 0, 0, 0, implicit $exec, implicit $flat_scr
+ %0:sgpr(s64) = COPY $sgpr2_sgpr3
+ %1:vgpr(s64) = COPY %0
+ %2:vgpr(s32) = G_IMPLICIT_DEF
+ G_STORE %2, %1 :: (store 4 into %ir.global0)
+...
+---