44 lines
1.6 KiB
LLVM
44 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
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; RUN: llc < %s -mtriple=riscv64 -mattr=+v | FileCheck %s
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declare i64 @llvm.vscale.i64()
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declare float @llvm.vector.reduce.fadd.nxv4f32(float, <vscale x 4 x float>)
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define float @reduce_fadd(ptr %f) {
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; CHECK-LABEL: reduce_fadd:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: csrr a2, vlenb
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; CHECK-NEXT: srli a1, a2, 1
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; CHECK-NEXT: vsetvli a3, zero, e32, m1, ta, ma
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; CHECK-NEXT: vmv.s.x v8, zero
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; CHECK-NEXT: slli a2, a2, 1
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; CHECK-NEXT: li a3, 1024
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; CHECK-NEXT: .LBB0_1: # %vector.body
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: vl2re32.v v10, (a0)
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; CHECK-NEXT: vsetvli a4, zero, e32, m2, ta, ma
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; CHECK-NEXT: vfredosum.vs v8, v10, v8
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; CHECK-NEXT: sub a3, a3, a1
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; CHECK-NEXT: add a0, a0, a2
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; CHECK-NEXT: bnez a3, .LBB0_1
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; CHECK-NEXT: # %bb.2: # %exit
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; CHECK-NEXT: vfmv.f.s fa0, v8
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; CHECK-NEXT: ret
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entry:
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%vscale = tail call i64 @llvm.vscale.i64()
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%vecsize = shl nuw nsw i64 %vscale, 2
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br label %vector.body
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vector.body:
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%index = phi i64 [ 0, %entry ], [ %index.next, %vector.body ]
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%vec.phi = phi float [ 0.000000e+00, %entry ], [ %acc, %vector.body ]
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%gep = getelementptr inbounds float, ptr %f, i64 %index
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%wide.load = load <vscale x 4 x float>, ptr %gep, align 4
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%acc = tail call float @llvm.vector.reduce.fadd.nxv4f32(float %vec.phi, <vscale x 4 x float> %wide.load)
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%index.next = add nuw i64 %index, %vecsize
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%done = icmp eq i64 %index.next, 1024
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br i1 %done, label %exit, label %vector.body
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exit:
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ret float %acc
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}
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