derek.holloway
7502bf64a4
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45 lines
1.6 KiB
LLVM
45 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
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; RUN: llc -mtriple=riscv64 -mattr=+v -verify-machineinstrs < %s | FileCheck %s
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define i32 @loop_live_out(ptr %p, i64 %n) {
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; CHECK-LABEL: loop_live_out:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: mv a2, a0
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; CHECK-NEXT: .LBB0_1: # %loop
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: vsetvli a3, a1, e32, m2, ta, ma
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; CHECK-NEXT: vle32.v v8, (a2)
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; CHECK-NEXT: sub a1, a1, a3
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; CHECK-NEXT: vadd.vi v8, v8, 1
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; CHECK-NEXT: vse32.v v8, (a2)
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; CHECK-NEXT: slli a2, a3, 2
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; CHECK-NEXT: add a2, a0, a2
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; CHECK-NEXT: bnez a1, .LBB0_1
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; CHECK-NEXT: # %bb.2: # %exit
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; CHECK-NEXT: addi a3, a3, -1
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; CHECK-NEXT: vsetivli zero, 1, e32, m2, ta, ma
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; CHECK-NEXT: vslidedown.vx v8, v8, a3
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; CHECK-NEXT: vmv.x.s a0, v8
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; CHECK-NEXT: ret
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entry:
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br label %loop
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loop:
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%avl = phi i64 [%n, %entry], [%avl.next, %loop]
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%gep = phi ptr [%p, %entry], [%gep.next, %loop]
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%vl = call i32 @llvm.experimental.get.vector.length(i64 %avl, i32 4, i1 true)
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%x = call <vscale x 4 x i32> @llvm.vp.load(ptr %gep, <vscale x 4 x i1> splat (i1 true), i32 %vl)
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%y = add <vscale x 4 x i32> %x, splat (i32 1)
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call void @llvm.vp.store(<vscale x 4 x i32> %y, ptr %gep, <vscale x 4 x i1> splat (i1 true), i32 %vl)
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%vl.zext = zext i32 %vl to i64
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%avl.next = sub i64 %avl, %vl.zext
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%gep.next = getelementptr i32, ptr %p, i32 %vl
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%ec = icmp eq i64 %avl.next, 0
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br i1 %ec, label %exit, label %loop
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exit:
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%lastidx = sub i64 %vl.zext, 1
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%lastelt = extractelement <vscale x 4 x i32> %y, i64 %lastidx
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ret i32 %lastelt
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}
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