[PATCH] D19994: AMDGPU/SI: Make sure to emit TargetConstant nodes when matching ds_*permute
Tom Stellard via llvm-commits
llvm-commits at lists.llvm.org
Thu May 5 14:06:49 PDT 2016
tstellarAMD created this revision.
tstellarAMD added reviewers: arsenm, scchan.
tstellarAMD added a subscriber: llvm-commits.
Herald added a subscriber: arsenm.
This fixes a bug with ds_*permute instructions where if it was passed a
constant address, then the offset operand would get assigned a register
operand instead of an immediate.
http://reviews.llvm.org/D19994
Files:
lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
test/CodeGen/AMDGPU/llvm.amdgcn.ds.bpermute.ll
Index: test/CodeGen/AMDGPU/llvm.amdgcn.ds.bpermute.ll
===================================================================
--- test/CodeGen/AMDGPU/llvm.amdgcn.ds.bpermute.ll
+++ test/CodeGen/AMDGPU/llvm.amdgcn.ds.bpermute.ll
@@ -21,4 +21,13 @@
ret void
}
+; CHECK-LABEL: {{^}}ds_bpermute_imm_index:
+; CHECK: ds_bpermute_b32 v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}} offset:64
+; CHECK: s_waitcnt lgkmcnt
+define void @ds_bpermute_imm_index(i32 addrspace(1)* %out, i32 %base_index, i32 %src) nounwind {
+ %bpermute = call i32 @llvm.amdgcn.ds.bpermute(i32 64, i32 %src) #0
+ store i32 %bpermute, i32 addrspace(1)* %out, align 4
+ ret void
+}
+
attributes #0 = { nounwind readnone convergent }
Index: lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
===================================================================
--- lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
+++ lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
@@ -852,7 +852,7 @@
Zero, Addr.getOperand(1));
Base = SDValue(MachineSub, 0);
- Offset = Addr.getOperand(0);
+ Offset = CurDAG->getTargetConstant(ByteOffset, DL, MVT::i16);
return true;
}
}
@@ -870,7 +870,7 @@
MachineSDNode *MovZero = CurDAG->getMachineNode(AMDGPU::V_MOV_B32_e32,
DL, MVT::i32, Zero);
Base = SDValue(MovZero, 0);
- Offset = Addr;
+ Offset = CurDAG->getTargetConstant(CAddr->getZExtValue(), DL, MVT::i16);
return true;
}
}
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