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llvm-mirror/test/CodeGen/AMDGPU/GlobalISel/regbankselect-split-scalar-load-metadata.mir
Matt Arsenault 587fbc0a85 CodeGen: Don't drop AA metadata when splitting MachineMemOperands
Assuming this is used to split a memory access into smaller pieces,
the new access should still have the same aliasing properties as the
original memory access. As far as I can tell, this wasn't
intentionally dropped. It may be necessary to drop this if you are
moving the operand outside of the bounds of the original object in
such a way that it may alias another IR object, but I don't think any
of the existing users are doing this. Some of the uses widen into
unused alignment padding, which I think is OK.
2020-08-20 16:17:30 -04:00

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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=hawaii -run-pass=regbankselect %s -o - | FileCheck -check-prefix=SI %s
--- |
define amdgpu_ps i96 @split_smrd_load_range(i96 addrspace(4)* %ptr) {
%load = load i96, i96 addrspace(4)* %ptr, !range !0
ret i96 %load
}
define amdgpu_ps <3 x i32> @split_smrd_load_tbaa(<3 x i32> addrspace(4)* %ptr) {
%load = load <3 x i32>, <3 x i32> addrspace(4)* %ptr, !tbaa !1
ret <3 x i32> %load
}
!0 = !{i96 0, i96 9223372036854775808}
!1 = !{!"omnipotent char", !2}
!2 = !{!"Simple C/C++ TBAA"}
...
# Make sure range metadata is not preserved when widening loads, but
# tbaa is.
---
name: split_smrd_load_range
legalized: true
body: |
bb.0:
liveins: $sgpr0_sgpr1
; SI-LABEL: name: split_smrd_load_range
; SI: [[COPY:%[0-9]+]]:sgpr(p4) = COPY $sgpr0_sgpr1
; SI: [[LOAD:%[0-9]+]]:sgpr(<2 x s32>) = G_LOAD [[COPY]](p4) :: (load 8, addrspace 4)
; SI: [[C:%[0-9]+]]:sgpr(s64) = G_CONSTANT i64 8
; SI: [[PTR_ADD:%[0-9]+]]:sgpr(p4) = G_PTR_ADD [[COPY]], [[C]](s64)
; SI: [[LOAD1:%[0-9]+]]:sgpr(s32) = G_LOAD [[PTR_ADD]](p4) :: (load 4 + 8, align 8, addrspace 4)
; SI: [[DEF:%[0-9]+]]:sgpr(<3 x s32>) = G_IMPLICIT_DEF
; SI: [[INSERT:%[0-9]+]]:sgpr(<3 x s32>) = G_INSERT [[DEF]], [[LOAD]](<2 x s32>), 0
; SI: [[INSERT1:%[0-9]+]]:sgpr(<3 x s32>) = G_INSERT [[INSERT]], [[LOAD1]](s32), 64
; SI: $sgpr0_sgpr1_sgpr2 = COPY [[INSERT1]](<3 x s32>)
%0:_(p4) = COPY $sgpr0_sgpr1
%1:_(<3 x s32>) = G_LOAD %0 :: (load 12, align 8, addrspace 4, !range !0)
$sgpr0_sgpr1_sgpr2 = COPY %1
...
---
name: split_smrd_load_tbaa
legalized: true
body: |
bb.0:
liveins: $sgpr0_sgpr1
; SI-LABEL: name: split_smrd_load_tbaa
; SI: [[COPY:%[0-9]+]]:sgpr(p4) = COPY $sgpr0_sgpr1
; SI: [[LOAD:%[0-9]+]]:sgpr(<2 x s32>) = G_LOAD [[COPY]](p4) :: (load 8, !tbaa !2, addrspace 4)
; SI: [[C:%[0-9]+]]:sgpr(s64) = G_CONSTANT i64 8
; SI: [[PTR_ADD:%[0-9]+]]:sgpr(p4) = G_PTR_ADD [[COPY]], [[C]](s64)
; SI: [[LOAD1:%[0-9]+]]:sgpr(s32) = G_LOAD [[PTR_ADD]](p4) :: (load 4 + 8, align 8, !tbaa !2, addrspace 4)
; SI: [[DEF:%[0-9]+]]:sgpr(<3 x s32>) = G_IMPLICIT_DEF
; SI: [[INSERT:%[0-9]+]]:sgpr(<3 x s32>) = G_INSERT [[DEF]], [[LOAD]](<2 x s32>), 0
; SI: [[INSERT1:%[0-9]+]]:sgpr(<3 x s32>) = G_INSERT [[INSERT]], [[LOAD1]](s32), 64
; SI: $sgpr0_sgpr1_sgpr2 = COPY [[INSERT1]](<3 x s32>)
%0:_(p4) = COPY $sgpr0_sgpr1
%1:_(<3 x s32>) = G_LOAD %0 :: (load 12, align 8, addrspace 4, !tbaa !1)
$sgpr0_sgpr1_sgpr2 = COPY %1
...