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TheRock/compiler/amd-llvm/llvm/test/CodeGen/AMDGPU/divergence-driven-ctpop.ll
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

55 lines
2.4 KiB
LLVM

; RUN: llc -mtriple=amdgcn -stop-after=amdgpu-isel < %s | FileCheck -check-prefix=GCN %s
; RUN: llc -mtriple=amdgcn -enable-new-pm -stop-after=amdgpu-isel < %s | FileCheck -check-prefix=GCN %s
; GCN-LABEL: name: s_ctpop_i32
; GCN: S_BCNT1_I32_B32
define amdgpu_kernel void @s_ctpop_i32(ptr addrspace(1) noalias %out, i32 %val) nounwind {
%ctpop = call i32 @llvm.ctpop.i32(i32 %val) nounwind readnone
store i32 %ctpop, ptr addrspace(1) %out, align 4
ret void
}
; GCN-LABEL: name: s_ctpop_i64
; GCN: %[[BCNT:[0-9]+]]:sreg_32 = S_BCNT1_I32_B64
; GCN: %[[SREG1:[0-9]+]]:sreg_32 = COPY killed %[[BCNT]]
; GCN: %[[SREG2:[0-9]+]]:sreg_32 = S_MOV_B32 0
; GCN: REG_SEQUENCE killed %[[SREG1]], %subreg.sub0, killed %[[SREG2]], %subreg.sub1
define amdgpu_kernel void @s_ctpop_i64(ptr addrspace(1) noalias %out, i64 %val) nounwind {
%ctpop = call i64 @llvm.ctpop.i64(i64 %val) nounwind readnone
%truncctpop = trunc i64 %ctpop to i32
store i32 %truncctpop, ptr addrspace(1) %out, align 4
ret void
}
; GCN-LABEL: name: v_ctpop_i32
; GCN: V_BCNT_U32_B32_e64
define amdgpu_kernel void @v_ctpop_i32(ptr addrspace(1) noalias %out, ptr addrspace(1) noalias %in) nounwind {
%tid = call i32 @llvm.amdgcn.workitem.id.x()
%in.gep = getelementptr i32, ptr addrspace(1) %in, i32 %tid
%val = load i32, ptr addrspace(1) %in.gep, align 4
%ctpop = call i32 @llvm.ctpop.i32(i32 %val) nounwind readnone
store i32 %ctpop, ptr addrspace(1) %out, align 4
ret void
}
; GCN-LABEL: name: v_ctpop_i64
; GCN: %[[BCNT1:[0-9]+]]:vgpr_32 = V_BCNT_U32_B32_e64 killed %{{[0-9]+}}, 0, implicit $exec
; GCN: %[[BCNT2:[0-9]+]]:vgpr_32 = V_BCNT_U32_B32_e64 killed %{{[0-9]+}}, killed %[[BCNT1]], implicit $exec
; GCN: %[[VGPR1:[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
; GCN: REG_SEQUENCE killed %[[BCNT2]], %subreg.sub0, killed %[[VGPR1]], %subreg.sub1
define amdgpu_kernel void @v_ctpop_i64(ptr addrspace(1) noalias %out, ptr addrspace(1) noalias %in) nounwind {
%tid = call i32 @llvm.amdgcn.workitem.id.x()
%in.gep = getelementptr i64, ptr addrspace(1) %in, i32 %tid
%val = load i64, ptr addrspace(1) %in.gep, align 8
%ctpop = call i64 @llvm.ctpop.i64(i64 %val) nounwind readnone
%truncctpop = trunc i64 %ctpop to i32
store i32 %truncctpop, ptr addrspace(1) %out, align 4
ret void
}
declare i64 @llvm.ctpop.i64(i64) nounwind readnone
declare i32 @llvm.ctpop.i32(i32) nounwind readnone
declare i32 @llvm.amdgcn.workitem.id.x() nounwind readnone