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20f8334c2a
On AMDGPU SGPR spills are really spilled to another register. The spiller creates the spills to new frame index objects, which is used as a placeholder. This will eventually be replaced with a reference to a position in a VGPR to write to and the frame index deleted. It is most likely not a real stack location that can be shared with another stack object. This is a problem when StackSlotColoring decides it should combine a frame index used for a normal VGPR spill with a real stack location and a frame index used for an SGPR. Add an ID field so that StackSlotColoring has a way of knowing the different frame index types are incompatible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308673 91177308-0d34-0410-b5e6-96231b3b80d8
43 lines
1.2 KiB
YAML
43 lines
1.2 KiB
YAML
# RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass none -o - %s | FileCheck %s
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--- |
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@var = global i64 0
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@local_addr = global i64* null
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define void @stack_local() {
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entry:
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%local_var = alloca i64
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%val = load i64, i64* @var
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store i64 %val, i64* %local_var
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store i64* %local_var, i64** @local_addr
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ret void
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}
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...
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---
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name: stack_local
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tracksRegLiveness: true
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registers:
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- { id: 0, class: gpr64common }
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- { id: 1, class: gpr64 }
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- { id: 2, class: gpr64common }
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- { id: 3, class: gpr64common }
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frameInfo:
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maxAlignment: 8
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# CHECK-LABEL: stack_local
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# CHECK: stack:
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# CHECK: - { id: 0, name: local_var, type: default, offset: 0, size: 8, alignment: 8,
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# CHECK-NEXT: stack-id: 0, callee-saved-register: '', local-offset: -8, di-variable: '',
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# CHECK-NEXT: di-expression: '', di-location: '' }
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stack:
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- { id: 0,name: local_var,offset: 0,size: 8,alignment: 8, local-offset: -8 }
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body: |
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bb.0.entry:
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%0 = ADRP @var
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%1 = LDRXui killed %0, @var :: (load 8 from @var)
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STRXui killed %1, %stack.0.local_var, 0 :: (store 8 into %ir.local_var)
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%2 = ADRP @local_addr
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%3 = ADDXri %stack.0.local_var, 0, 0
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STRXui killed %3, killed %2, @local_addr :: (store 8 into @local_addr)
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RET_ReallyLR
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...
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