ad55ee5869
The structured CFG is just an aid to inserting exec mask modification instructions, once that is done we don't really need it anymore. We also do not analyze blocks with terminators that modify exec, so this should only be impacting true branches. llvm-svn: 288744
50 lines
1.7 KiB
LLVM
50 lines
1.7 KiB
LLVM
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
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; Make sure that m0 is not reinitialized in the loop.
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; GCN-LABEL: {{^}}copy_local_to_global_loop_m0_init:
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; GCN: s_cbranch_scc1 BB0_3
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; Initialize in preheader
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; GCN: s_mov_b32 m0, -1
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; GCN: BB0_2:
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; GCN-NOT: m0
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; GCN: ds_read_b32
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; GCN-NOT: m0
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; GCN: buffer_store_dword
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; GCN: s_cbranch_scc0 BB0_2
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; GCN: BB0_3:
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; GCN-NEXT: s_endpgm
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define void @copy_local_to_global_loop_m0_init(i32 addrspace(1)* noalias nocapture %out, i32 addrspace(3)* noalias nocapture readonly %in, i32 %n) #0 {
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bb:
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%tmp = icmp sgt i32 %n, 0
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br i1 %tmp, label %.lr.ph.preheader, label %._crit_edge
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.lr.ph.preheader: ; preds = %bb
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br label %.lr.ph
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._crit_edge.loopexit: ; preds = %.lr.ph
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br label %._crit_edge
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._crit_edge: ; preds = %._crit_edge.loopexit, %bb
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ret void
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.lr.ph: ; preds = %.lr.ph, %.lr.ph.preheader
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%indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.lr.ph.preheader ]
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%i.01 = phi i32 [ %tmp4, %.lr.ph ], [ 0, %.lr.ph.preheader ]
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%tmp1 = getelementptr inbounds i32, i32 addrspace(3)* %in, i32 %i.01
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%tmp2 = load i32, i32 addrspace(3)* %tmp1, align 4
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%tmp3 = getelementptr inbounds i32, i32 addrspace(1)* %out, i64 %indvars.iv
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store i32 %tmp2, i32 addrspace(1)* %tmp3, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%tmp4 = add nuw nsw i32 %i.01, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %._crit_edge.loopexit, label %.lr.ph
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}
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attributes #0 = { nounwind }
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