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ec17b58f39
Summary: We will be able to handle this case much better once the hazard recognizer is finished, but this conservative implementation fixes a hang with the piglit test: spec/arb_arrays_of_arrays/execution/sampler/fs-nested-struct-arrays-nonconst-nested-arra Reviewers: arsenm, nhaehnle Subscribers: arsenm, llvm-commits Differential Revision: http://reviews.llvm.org/D18988 llvm-svn: 266105
30 lines
1.0 KiB
LLVM
30 lines
1.0 KiB
LLVM
; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=FUNC -check-prefix=SI %s
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@ptr_load = addrspace(3) global i32 addrspace(2)* undef, align 8
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; Make sure when the load from %ptr2 is folded the chain isn't lost,
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; resulting in losing the store to gptr
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; FUNC-LABEL: {{^}}missing_store_reduced:
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; SI: ds_read_b64
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; SI: buffer_store_dword
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; SI: v_readfirstlane_b32 s[[PTR_LO:[0-9]+]], v{{[0-9]+}}
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; SI: v_readfirstlane_b32 s[[PTR_HI:[0-9]+]], v{{[0-9]+}}
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; SI-NEXT: s_nop
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; SI: s_load_dword s{{[0-9]+}}, s{{\[}}[[PTR_LO]]:[[PTR_HI]]{{\]}}
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; SI: buffer_store_dword
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; SI: s_endpgm
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define void @missing_store_reduced(i32 addrspace(1)* %out, i32 addrspace(1)* %gptr) #0 {
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%ptr0 = load i32 addrspace(2)*, i32 addrspace(2)* addrspace(3)* @ptr_load, align 8
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%ptr2 = getelementptr inbounds i32, i32 addrspace(2)* %ptr0, i64 2
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store i32 99, i32 addrspace(1)* %gptr, align 4
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%tmp2 = load i32, i32 addrspace(2)* %ptr2, align 4
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store i32 %tmp2, i32 addrspace(1)* %out, align 4
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ret void
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}
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attributes #0 = { nounwind }
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