66 lines
2.1 KiB
LLVM
66 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=aarch64-linux-gnu -verify-machineinstrs -o - %s | FileCheck %s
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; LSR used to pick a sub-optimal solution due to the target responding
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; conservatively to isLegalAddImmediate for negative values.
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declare void @foo(i32)
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define void @test(i32 %px) {
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; CHECK-LABEL: test:
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; CHECK: // %bb.0: // %entry
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; CHECK-NEXT: str x30, [sp, #-32]! // 8-byte Folded Spill
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; CHECK-NEXT: .cfi_def_cfa_offset 32
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; CHECK-NEXT: stp x20, x19, [sp, #16] // 16-byte Folded Spill
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; CHECK-NEXT: .cfi_offset w19, -8
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; CHECK-NEXT: .cfi_offset w20, -16
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; CHECK-NEXT: .cfi_offset w30, -32
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; CHECK-NEXT: subs w8, w0, #1
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; CHECK-NEXT: mov w19, w0
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; CHECK-NEXT: csel w20, wzr, w8, lt
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; CHECK-NEXT: b .LBB0_2
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; CHECK-NEXT: .LBB0_1: // %for.inc
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; CHECK-NEXT: // in Loop: Header=BB0_2 Depth=1
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; CHECK-NEXT: add w8, w20, #1
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; CHECK-NEXT: cmp w20, w19
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; CHECK-NEXT: mov w20, w8
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; CHECK-NEXT: b.gt .LBB0_4
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; CHECK-NEXT: .LBB0_2: // %for.body
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; CHECK-NEXT: // =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: cmp w19, w20
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; CHECK-NEXT: b.eq .LBB0_1
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; CHECK-NEXT: // %bb.3: // %if.then3
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; CHECK-NEXT: // in Loop: Header=BB0_2 Depth=1
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; CHECK-NEXT: mov w0, w20
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; CHECK-NEXT: bl foo
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; CHECK-NEXT: b .LBB0_1
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; CHECK-NEXT: .LBB0_4: // %for.cond.cleanup
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; CHECK-NEXT: ldp x20, x19, [sp, #16] // 16-byte Folded Reload
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; CHECK-NEXT: ldr x30, [sp], #32 // 8-byte Folded Reload
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; CHECK-NEXT: ret
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entry:
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%sub = add nsw i32 %px, -1
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%cmp = icmp slt i32 %px, 1
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%.sub = select i1 %cmp, i32 0, i32 %sub
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br label %for.body
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for.body:
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%x.015 = phi i32 [ %inc, %for.inc ], [ %.sub, %entry ]
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%cmp2 = icmp eq i32 %x.015, %px
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br i1 %cmp2, label %for.inc, label %if.then3
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if.then3:
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tail call void @foo(i32 %x.015)
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br label %for.inc
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for.inc:
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%inc = add nsw i32 %x.015, 1
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%cmp1 = icmp sgt i32 %x.015, %px
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br i1 %cmp1, label %for.cond.cleanup.loopexit, label %for.body
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for.cond.cleanup.loopexit:
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br label %for.cond.cleanup
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for.cond.cleanup:
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ret void
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}
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