a5cbd2ab0b
…133242)"
This reverts commit 130080fab1 because it
causes issues in testcases similar to coalescer_remat.ll [1], i.e. when
we use a VGPR tuple but only write to its lower parts. The high VGPRs
would then not be included in the vgpr_count, and accessing them would
be an out of bounds violation.
[1]
https://github.com/llvm/llvm-project/blob/main/llvm/test/CodeGen/AMDGPU/coalescer_remat.ll
38 lines
1.5 KiB
LLVM
38 lines
1.5 KiB
LLVM
; RUN: llc -O0 -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 < %s | FileCheck %s
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; CallGraphAnalysis, which CodeGenSCC order depends on, does not look
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; through aliases. If GlobalOpt is never run, we do not see direct
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; calls,
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@alias1 = hidden alias void (), ptr @aliasee_vgpr32_sgpr76
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; The parent kernel has a higher VGPR usage than the possible callees.
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; CHECK-LABEL: {{^}}kernel1:
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; CHECK: .amdhsa_next_free_vgpr max(totalnumvgprs(kernel1.num_agpr, kernel1.num_vgpr), 1, 0)
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; CHECK-NEXT: .amdhsa_next_free_sgpr max(kernel1.numbered_sgpr+extrasgprs(kernel1.uses_vcc, kernel1.uses_flat_scratch, 1), 1, 0)-extrasgprs(kernel1.uses_vcc, kernel1.uses_flat_scratch, 1)
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; CHECK: .set kernel1.num_vgpr, max(42, .Laliasee_vgpr32_sgpr76.num_vgpr)
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; CHECK-NEXT: .set kernel1.num_agpr, max(0, .Laliasee_vgpr32_sgpr76.num_agpr)
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; CHECK-NEXT: .set kernel1.numbered_sgpr, max(33, .Laliasee_vgpr32_sgpr76.numbered_sgpr)
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define amdgpu_kernel void @kernel1() #0 {
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bb:
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call void asm sideeffect "; clobber v40 ", "~{v40}"()
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call void @alias1() #2
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ret void
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}
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; CHECK: .set .Laliasee_vgpr32_sgpr76.num_vgpr, 27
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; CHECK-NEXT: .set .Laliasee_vgpr32_sgpr76.num_agpr, 0
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; CHECK-NEXT: .set .Laliasee_vgpr32_sgpr76.numbered_sgpr, 32
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define internal void @aliasee_vgpr32_sgpr76() #1 {
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bb:
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call void asm sideeffect "; clobber v26 ", "~{v26}"()
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ret void
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}
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attributes #0 = { noinline norecurse nounwind optnone }
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attributes #1 = { noinline norecurse nounwind readnone willreturn "amdgpu-waves-per-eu"="8,10" }
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attributes #2 = { nounwind readnone willreturn }
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