265e94e657
Summary: Extend cachepolicy operand in the new VMEM buffer intrinsics to supply information whether the buffer data is swizzled. Also, propagate this information to MIR. Intrinsics updated: int_amdgcn_raw_buffer_load int_amdgcn_raw_buffer_load_format int_amdgcn_raw_buffer_store int_amdgcn_raw_buffer_store_format int_amdgcn_raw_tbuffer_load int_amdgcn_raw_tbuffer_store int_amdgcn_struct_buffer_load int_amdgcn_struct_buffer_load_format int_amdgcn_struct_buffer_store int_amdgcn_struct_buffer_store_format int_amdgcn_struct_tbuffer_load int_amdgcn_struct_tbuffer_store Furthermore, disable merging of VMEM buffer instructions in SI Load/Store optimizer, if the "swizzled" bit on the instruction is on. The default value of the bit is 0, meaning that data in buffer is linear and buffer instructions can be merged. There is no difference in the generated code with this commit. However, in the future it will be expected that front-ends use buffer intrinsics with correct "swizzled" bit set. Reviewers: arsenm, nhaehnle, tpr Reviewed By: nhaehnle Subscribers: arsenm, kzhuravl, jvesely, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye, arphaman, jfb, Petar.Avramovic, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D68200 llvm-svn: 373491
41 lines
1.2 KiB
YAML
41 lines
1.2 KiB
YAML
# RUN: llc --mtriple=amdgcn--amdhsa -mcpu=fiji -verify-machineinstrs -run-pass si-fold-operands,si-shrink-instructions %s -o - | FileCheck %s
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--- |
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define amdgpu_kernel void @test() #0 {
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ret void
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}
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attributes #0 = { nounwind }
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...
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---
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# This used to crash / trigger an assertion, because re-scanning the use list
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# after constant-folding the definition of %3 lead to the definition of %2
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# being processed twice.
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# CHECK-LABEL: name: test
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# CHECK: %2:vgpr_32 = V_LSHLREV_B32_e32 2, killed %0, implicit $exec
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# CHECK: %4:vgpr_32 = V_AND_B32_e32 8, killed %2, implicit $exec
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name: test
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tracksRegLiveness: true
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registers:
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- { id: 0, class: vgpr_32 }
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- { id: 1, class: sreg_32 }
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- { id: 2, class: vgpr_32 }
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- { id: 3, class: sreg_32 }
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- { id: 4, class: vgpr_32 }
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- { id: 5, class: sreg_128 }
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body: |
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bb.0 (%ir-block.0):
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%0 = IMPLICIT_DEF
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%1 = S_MOV_B32 2
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%2 = V_LSHLREV_B32_e64 %1, killed %0, implicit $exec
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%3 = S_LSHL_B32 %1, killed %1, implicit-def dead $scc
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%4 = V_AND_B32_e64 killed %2, killed %3, implicit $exec
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%5 = IMPLICIT_DEF
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BUFFER_STORE_DWORD_OFFSET killed %4, killed %5, 0, 0, 0, 0, 0, 0, 0, implicit $exec
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S_ENDPGM 0
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...
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