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AMDGPU: Make llvm.amdgcn.make.buffer.rsrc propagate poison #141913

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Merged
merged 1 commit into from
May 29, 2025
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AMDGPU: Make llvm.amdgcn.make.buffer.rsrc propagate poison #141913

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6 changes: 6 additions & 0 deletions llvm/lib/Target/AMDGPU/AMDGPUInstCombineIntrinsic.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1527,6 +1527,12 @@ GCNTTIImpl::instCombineIntrinsic(InstCombiner &IC, IntrinsicInst &II) const {
return IC.replaceInstUsesWith(II, ConstantInt::getFalse(II.getType()));
break;
}
case Intrinsic::amdgcn_make_buffer_rsrc: {
Value *Src = II.getArgOperand(0);
if (isa<PoisonValue>(Src))
return IC.replaceInstUsesWith(II, PoisonValue::get(II.getType()));
return std::nullopt;
}
case Intrinsic::amdgcn_raw_buffer_store_format:
case Intrinsic::amdgcn_struct_buffer_store_format:
case Intrinsic::amdgcn_raw_tbuffer_store:
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21 changes: 21 additions & 0 deletions llvm/test/Transforms/InstCombine/AMDGPU/amdgcn-intrinsics.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -6520,3 +6520,24 @@ define amdgpu_kernel void @ds_bpermute_uniform_lane(ptr addrspace(1) %out, i32 %
store i32 %v, ptr addrspace(1) %out
ret void
}

; --------------------------------------------------------------------
; llvm.amdgcn.make.buffer.rsrc.p8
; --------------------------------------------------------------------

define ptr addrspace(8) @make_buffer_rsrc_poison() {
; CHECK-LABEL: @make_buffer_rsrc_poison(
; CHECK-NEXT: ret ptr addrspace(8) poison
;
%rsrc = call ptr addrspace(8) @llvm.amdgcn.make.buffer.rsrc.p8.p1(ptr addrspace(1) poison, i16 0, i32 1234, i32 5678)
ret ptr addrspace(8) %rsrc
}

define ptr addrspace(8) @make_buffer_rsrc_undef() {
; CHECK-LABEL: @make_buffer_rsrc_undef(
; CHECK-NEXT: [[RSRC:%.*]] = call ptr addrspace(8) @llvm.amdgcn.make.buffer.rsrc.p8.p1(ptr addrspace(1) undef, i16 0, i32 1234, i32 5678)
; CHECK-NEXT: ret ptr addrspace(8) [[RSRC]]
;
%rsrc = call ptr addrspace(8) @llvm.amdgcn.make.buffer.rsrc.p8.p1(ptr addrspace(1) undef, i16 0, i32 1234, i32 5678)
ret ptr addrspace(8) %rsrc
}
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