derek.holloway
7502bf64a4
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65 lines
2.2 KiB
LLVM
65 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sme -verify-machineinstrs < %s | FileCheck %s
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declare void @private_za_callee()
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; Ensure that we don't use tail call optimization when a lazy-save is required.
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define void @disable_tailcallopt() "aarch64_inout_za" nounwind {
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; CHECK-LABEL: disable_tailcallopt:
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; CHECK: // %bb.0:
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; CHECK-NEXT: stp x29, x30, [sp, #-16]! // 16-byte Folded Spill
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; CHECK-NEXT: mov x29, sp
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; CHECK-NEXT: sub sp, sp, #16
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; CHECK-NEXT: rdsvl x8, #1
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; CHECK-NEXT: mov x9, sp
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; CHECK-NEXT: msub x9, x8, x8, x9
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; CHECK-NEXT: mov sp, x9
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; CHECK-NEXT: sub x10, x29, #16
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; CHECK-NEXT: stp x9, x8, [x29, #-16]
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; CHECK-NEXT: msr TPIDR2_EL0, x10
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; CHECK-NEXT: bl private_za_callee
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; CHECK-NEXT: smstart za
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; CHECK-NEXT: mrs x8, TPIDR2_EL0
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; CHECK-NEXT: sub x0, x29, #16
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; CHECK-NEXT: cbnz x8, .LBB0_2
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; CHECK-NEXT: // %bb.1:
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; CHECK-NEXT: bl __arm_tpidr2_restore
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; CHECK-NEXT: .LBB0_2:
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; CHECK-NEXT: msr TPIDR2_EL0, xzr
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; CHECK-NEXT: mov sp, x29
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; CHECK-NEXT: ldp x29, x30, [sp], #16 // 16-byte Folded Reload
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; CHECK-NEXT: ret
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tail call void @private_za_callee()
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ret void
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}
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; Ensure we set up and restore the lazy save correctly for instructions which are lowered to lib calls
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define fp128 @f128_call_za(fp128 %a, fp128 %b) "aarch64_inout_za" nounwind {
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; CHECK-LABEL: f128_call_za:
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; CHECK: // %bb.0:
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; CHECK-NEXT: stp x29, x30, [sp, #-16]! // 16-byte Folded Spill
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; CHECK-NEXT: mov x29, sp
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; CHECK-NEXT: sub sp, sp, #16
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; CHECK-NEXT: rdsvl x8, #1
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; CHECK-NEXT: mov x9, sp
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; CHECK-NEXT: msub x9, x8, x8, x9
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; CHECK-NEXT: mov sp, x9
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; CHECK-NEXT: sub x10, x29, #16
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; CHECK-NEXT: stp x9, x8, [x29, #-16]
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; CHECK-NEXT: msr TPIDR2_EL0, x10
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; CHECK-NEXT: bl __addtf3
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; CHECK-NEXT: smstart za
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; CHECK-NEXT: mrs x8, TPIDR2_EL0
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; CHECK-NEXT: sub x0, x29, #16
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; CHECK-NEXT: cbnz x8, .LBB1_2
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; CHECK-NEXT: // %bb.1:
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; CHECK-NEXT: bl __arm_tpidr2_restore
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; CHECK-NEXT: .LBB1_2:
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; CHECK-NEXT: msr TPIDR2_EL0, xzr
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; CHECK-NEXT: mov sp, x29
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; CHECK-NEXT: ldp x29, x30, [sp], #16 // 16-byte Folded Reload
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; CHECK-NEXT: ret
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%res = fadd fp128 %a, %b
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ret fp128 %res
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}
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