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c3e6f1db48
An extractelement with non-constant index will be lowered either to scratch or movrel loop in most cases. This patch converts such instruction into a set of selects if vector size is not too big. Differential Revision: https://reviews.llvm.org/D54351 llvm-svn: 346800
49 lines
2.5 KiB
LLVM
49 lines
2.5 KiB
LLVM
; RUN: llc -march=amdgcn -mtriple=amdgcn-- -verify-machineinstrs < %s | FileCheck -enable-var-scope -check-prefix=GCN %s
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; RUN: llc -march=amdgcn -mtriple=amdgcn-- -mcpu=tonga -mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -enable-var-scope -check-prefix=GCN %s
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; GCN-LABEL: {{^}}extract_vector_elt_v3f64_2:
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; GCN: buffer_load_dwordx4
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; GCN: buffer_load_dwordx2
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; GCN: buffer_store_dwordx2
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define amdgpu_kernel void @extract_vector_elt_v3f64_2(double addrspace(1)* %out, <3 x double> addrspace(1)* %in) #0 {
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%ld = load volatile <3 x double>, <3 x double> addrspace(1)* %in
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%elt = extractelement <3 x double> %ld, i32 2
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store volatile double %elt, double addrspace(1)* %out
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ret void
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}
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; GCN-LABEL: {{^}}dyn_extract_vector_elt_v3f64:
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; GCN-NOT: buffer_load
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; GCN-DAG: v_cmp_eq_u32_e64 [[C1:[^,]+]], [[IDX:s[0-9]+]], 1
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; GCN-DAG: v_cmp_eq_u32_e64 [[C2:[^,]+]], [[IDX]], 2
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; GCN-DAG: v_cndmask_b32_e{{32|64}} v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, [[C1]]
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; GCN-DAG: v_cndmask_b32_e{{32|64}} v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, [[C1]]
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; GCN-DAG: v_cndmask_b32_e{{32|64}} v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, [[C2]]
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; GCN-DAG: v_cndmask_b32_e{{32|64}} v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, [[C2]]
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; GCN: store_dwordx2 v[{{[0-9:]+}}]
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define amdgpu_kernel void @dyn_extract_vector_elt_v3f64(double addrspace(1)* %out, <3 x double> %foo, i32 %elt) #0 {
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%dynelt = extractelement <3 x double> %foo, i32 %elt
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store volatile double %dynelt, double addrspace(1)* %out
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ret void
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}
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; GCN-LABEL: {{^}}dyn_extract_vector_elt_v4f64:
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; GCN-NOT: buffer_load
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; GCN-DAG: v_cmp_eq_u32_e64 [[C1:[^,]+]], [[IDX:s[0-9]+]], 1
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; GCN-DAG: v_cmp_eq_u32_e64 [[C2:[^,]+]], [[IDX]], 2
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; GCN-DAG: v_cmp_eq_u32_e64 [[C3:[^,]+]], [[IDX]], 3
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; GCN-DAG: v_cndmask_b32_e{{32|64}} v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, [[C1]]
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; GCN-DAG: v_cndmask_b32_e{{32|64}} v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, [[C1]]
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; GCN-DAG: v_cndmask_b32_e{{32|64}} v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, [[C2]]
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; GCN-DAG: v_cndmask_b32_e{{32|64}} v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, [[C2]]
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; GCN-DAG: v_cndmask_b32_e{{32|64}} v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, [[C3]]
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; GCN-DAG: v_cndmask_b32_e{{32|64}} v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, [[C3]]
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; GCN: store_dwordx2 v[{{[0-9:]+}}]
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define amdgpu_kernel void @dyn_extract_vector_elt_v4f64(double addrspace(1)* %out, <4 x double> %foo, i32 %elt) #0 {
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%dynelt = extractelement <4 x double> %foo, i32 %elt
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store volatile double %dynelt, double addrspace(1)* %out
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ret void
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}
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attributes #0 = { nounwind }
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