8d0383eb69
This was stored in LiveIntervals, but not actually used for anything related to LiveIntervals. It was only used in one check for if a load instruction is rematerializable. I also don't think this was entirely correct, since it was implicitly assuming constant loads are also dereferenceable. Remove this and rely only on the invariant+dereferenceable flags in the memory operand. Set the flag based on the AA query upfront. This should have the same net benefit, but has the possible disadvantage of making this AA query nonlazy. Preserve the behavior of assuming pointsToConstantMemory implying dereferenceable for now, but maybe this should be changed.
26 lines
1.7 KiB
LLVM
26 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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; RUN: llc -global-isel -march=amdgcn -mcpu=gfx900 -verify-machineinstrs -stop-after twoaddressinstruction < %s | FileCheck %s
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; Check that %16 gets constrained to register class sgpr_96_with_sub0_sub1.
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define amdgpu_ps <3 x i32> @s_load_constant_v3i32_align4(<3 x i32> addrspace(4)* inreg %ptr) {
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; CHECK-LABEL: name: s_load_constant_v3i32_align4
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; CHECK: bb.0 (%ir-block.0):
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; CHECK-NEXT: liveins: $sgpr0, $sgpr1
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: [[COPY:%[0-9]+]]:sreg_32 = COPY killed $sgpr0
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; CHECK-NEXT: [[COPY1:%[0-9]+]]:sreg_32 = COPY killed $sgpr1
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; CHECK-NEXT: undef %0.sub0:sreg_64 = COPY killed [[COPY]]
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; CHECK-NEXT: %0.sub1:sreg_64 = COPY killed [[COPY1]]
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; CHECK-NEXT: [[S_LOAD_DWORDX2_IMM:%[0-9]+]]:sreg_64_xexec = S_LOAD_DWORDX2_IMM %0, 0, 0 :: (dereferenceable invariant load (<2 x s32>) from %ir.ptr, align 4, addrspace 4)
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; CHECK-NEXT: [[S_LOAD_DWORD_IMM:%[0-9]+]]:sreg_32_xm0_xexec = S_LOAD_DWORD_IMM killed %0, 8, 0 :: (dereferenceable invariant load (s32) from %ir.ptr + 8, addrspace 4)
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; CHECK-NEXT: [[COPY2:%[0-9]+]]:sreg_32 = COPY [[S_LOAD_DWORDX2_IMM]].sub0
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; CHECK-NEXT: $sgpr0 = COPY killed [[COPY2]]
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; CHECK-NEXT: [[COPY3:%[0-9]+]]:sreg_32 = COPY killed [[S_LOAD_DWORDX2_IMM]].sub1
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; CHECK-NEXT: $sgpr1 = COPY killed [[COPY3]]
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; CHECK-NEXT: [[COPY4:%[0-9]+]]:sreg_32 = COPY killed [[S_LOAD_DWORD_IMM]]
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; CHECK-NEXT: $sgpr2 = COPY killed [[COPY4]]
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; CHECK-NEXT: SI_RETURN_TO_EPILOG implicit killed $sgpr0, implicit killed $sgpr1, implicit killed $sgpr2
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%load = load <3 x i32>, <3 x i32> addrspace(4)* %ptr, align 4
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ret <3 x i32> %load
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}
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