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505ef9e320
A DLS lr, lr instruction only moves lr to itself. It need not be emitted on it's own to save a instruction in the loop preheader. Differential Revision: https://reviews.llvm.org/D78916
257 lines
12 KiB
LLVM
257 lines
12 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=thumbv8.1m.main-none-eabi -mattr=+mve.fp -o - %s | FileCheck --check-prefix=CHECK %s
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define void @tailpred(half* nocapture readonly %pSrcA, half* nocapture readonly %pSrcB, half* nocapture %pDst, i32 %blockSize) {
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; CHECK-LABEL: tailpred:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r4, r5, r7, lr}
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; CHECK-NEXT: push {r4, r5, r7, lr}
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; CHECK-NEXT: cmp r3, #0
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; CHECK-NEXT: beq .LBB0_6
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; CHECK-NEXT: @ %bb.1: @ %vector.memcheck
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; CHECK-NEXT: add.w r5, r2, r3, lsl #1
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; CHECK-NEXT: add.w r4, r1, r3, lsl #1
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; CHECK-NEXT: cmp r5, r1
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; CHECK-NEXT: cset r12, hi
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; CHECK-NEXT: cmp r4, r2
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; CHECK-NEXT: cset lr, hi
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; CHECK-NEXT: cmp r5, r0
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; CHECK-NEXT: add.w r5, r0, r3, lsl #1
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; CHECK-NEXT: cset r4, hi
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; CHECK-NEXT: cmp r5, r2
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; CHECK-NEXT: cset r5, hi
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; CHECK-NEXT: ands r4, r5
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; CHECK-NEXT: lsls r4, r4, #31
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; CHECK-NEXT: itt eq
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; CHECK-NEXT: andeq.w r5, lr, r12
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; CHECK-NEXT: lslseq.w r5, r5, #31
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; CHECK-NEXT: beq .LBB0_4
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; CHECK-NEXT: @ %bb.2: @ %while.body.preheader
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; CHECK-NEXT: dls lr, r3
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; CHECK-NEXT: .LBB0_3: @ %while.body
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; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: vldr.16 s0, [r0]
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; CHECK-NEXT: vldr.16 s2, [r1]
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; CHECK-NEXT: adds r1, #2
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; CHECK-NEXT: adds r0, #2
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; CHECK-NEXT: vadd.f16 s0, s2, s0
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; CHECK-NEXT: vstr.16 s0, [r2]
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; CHECK-NEXT: adds r2, #2
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; CHECK-NEXT: le lr, .LBB0_3
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; CHECK-NEXT: b .LBB0_6
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; CHECK-NEXT: .LBB0_4: @ %vector.ph
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; CHECK-NEXT: dlstp.16 lr, r3
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; CHECK-NEXT: .LBB0_5: @ %vector.body
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; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: vldrh.u16 q0, [r0], #16
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; CHECK-NEXT: vldrh.u16 q1, [r1], #16
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; CHECK-NEXT: vadd.f16 q0, q1, q0
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; CHECK-NEXT: vstrh.16 q0, [r2], #16
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; CHECK-NEXT: letp lr, .LBB0_5
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; CHECK-NEXT: .LBB0_6: @ %while.end
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; CHECK-NEXT: pop {r4, r5, r7, pc}
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entry:
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%cmp.not6 = icmp eq i32 %blockSize, 0
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br i1 %cmp.not6, label %while.end, label %vector.memcheck
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vector.memcheck: ; preds = %entry
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%scevgep = getelementptr half, half* %pDst, i32 %blockSize
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%scevgep14 = getelementptr half, half* %pSrcA, i32 %blockSize
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%scevgep17 = getelementptr half, half* %pSrcB, i32 %blockSize
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%bound0 = icmp ugt half* %scevgep14, %pDst
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%bound1 = icmp ugt half* %scevgep, %pSrcA
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%found.conflict = and i1 %bound0, %bound1
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%bound019 = icmp ugt half* %scevgep17, %pDst
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%bound120 = icmp ugt half* %scevgep, %pSrcB
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%found.conflict21 = and i1 %bound019, %bound120
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%conflict.rdx = or i1 %found.conflict, %found.conflict21
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br i1 %conflict.rdx, label %while.body, label %vector.ph
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vector.ph: ; preds = %vector.memcheck
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%n.rnd.up = add i32 %blockSize, 7
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%n.vec = and i32 %n.rnd.up, -8
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br label %vector.body
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vector.body: ; preds = %vector.body, %vector.ph
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%index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
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%next.gep = getelementptr half, half* %pSrcA, i32 %index
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%next.gep28 = getelementptr half, half* %pDst, i32 %index
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%next.gep29 = getelementptr half, half* %pSrcB, i32 %index
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%active.lane.mask = call <8 x i1> @llvm.get.active.lane.mask.v8i1.i32(i32 %index, i32 %blockSize)
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%0 = bitcast half* %next.gep to <8 x half>*
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%wide.masked.load = call <8 x half> @llvm.masked.load.v8f16.p0v8f16(<8 x half>* %0, i32 2, <8 x i1> %active.lane.mask, <8 x half> undef)
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%1 = bitcast half* %next.gep29 to <8 x half>*
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%wide.masked.load32 = call <8 x half> @llvm.masked.load.v8f16.p0v8f16(<8 x half>* %1, i32 2, <8 x i1> %active.lane.mask, <8 x half> undef)
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%2 = fadd fast <8 x half> %wide.masked.load32, %wide.masked.load
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%3 = bitcast half* %next.gep28 to <8 x half>*
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call void @llvm.masked.store.v8f16.p0v8f16(<8 x half> %2, <8 x half>* %3, i32 2, <8 x i1> %active.lane.mask)
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%index.next = add i32 %index, 8
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%4 = icmp eq i32 %index.next, %n.vec
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br i1 %4, label %while.end, label %vector.body
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while.body: ; preds = %vector.memcheck, %while.body
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%blkCnt.010 = phi i32 [ %dec, %while.body ], [ %blockSize, %vector.memcheck ]
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%pSrcA.addr.09 = phi half* [ %incdec.ptr, %while.body ], [ %pSrcA, %vector.memcheck ]
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%pDst.addr.08 = phi half* [ %incdec.ptr3, %while.body ], [ %pDst, %vector.memcheck ]
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%pSrcB.addr.07 = phi half* [ %incdec.ptr1, %while.body ], [ %pSrcB, %vector.memcheck ]
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%incdec.ptr = getelementptr inbounds half, half* %pSrcA.addr.09, i32 1
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%5 = load half, half* %pSrcA.addr.09, align 2
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%incdec.ptr1 = getelementptr inbounds half, half* %pSrcB.addr.07, i32 1
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%6 = load half, half* %pSrcB.addr.07, align 2
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%7 = fadd fast half %6, %5
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%incdec.ptr3 = getelementptr inbounds half, half* %pDst.addr.08, i32 1
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store half %7, half* %pDst.addr.08, align 2
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%dec = add i32 %blkCnt.010, -1
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%cmp.not = icmp eq i32 %dec, 0
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br i1 %cmp.not, label %while.end, label %while.body
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while.end: ; preds = %vector.body, %while.body, %entry
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ret void
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}
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define void @notailpred(half* nocapture readonly %pSrcA, half* nocapture readonly %pSrcB, half* nocapture %pDst, i32 %blockSize) {
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; CHECK-LABEL: notailpred:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r4, r5, r6, r7, lr}
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; CHECK-NEXT: push {r4, r5, r6, r7, lr}
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; CHECK-NEXT: cbz r3, .LBB1_6
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; CHECK-NEXT: @ %bb.1: @ %while.body.preheader
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; CHECK-NEXT: cmp r3, #8
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; CHECK-NEXT: blo .LBB1_3
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; CHECK-NEXT: @ %bb.2: @ %vector.memcheck
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; CHECK-NEXT: add.w r5, r2, r3, lsl #1
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; CHECK-NEXT: add.w r6, r1, r3, lsl #1
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; CHECK-NEXT: cmp r5, r1
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; CHECK-NEXT: add.w r4, r0, r3, lsl #1
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; CHECK-NEXT: cset r7, hi
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; CHECK-NEXT: cmp r6, r2
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; CHECK-NEXT: cset r6, hi
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; CHECK-NEXT: cmp r5, r0
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; CHECK-NEXT: cset r5, hi
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; CHECK-NEXT: cmp r4, r2
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; CHECK-NEXT: cset r4, hi
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; CHECK-NEXT: ands r5, r4
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; CHECK-NEXT: lsls r5, r5, #31
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; CHECK-NEXT: itt eq
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; CHECK-NEXT: andeq r7, r6
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; CHECK-NEXT: lslseq.w r7, r7, #31
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; CHECK-NEXT: beq .LBB1_7
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; CHECK-NEXT: .LBB1_3:
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; CHECK-NEXT: mov r5, r3
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; CHECK-NEXT: mov r12, r0
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; CHECK-NEXT: mov r7, r2
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; CHECK-NEXT: mov r4, r1
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; CHECK-NEXT: .LBB1_4: @ %while.body.preheader31
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; CHECK-NEXT: dls lr, r5
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; CHECK-NEXT: .LBB1_5: @ %while.body
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; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: vldr.16 s0, [r12]
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; CHECK-NEXT: vldr.16 s2, [r4]
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; CHECK-NEXT: adds r4, #2
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; CHECK-NEXT: add.w r12, r12, #2
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; CHECK-NEXT: vadd.f16 s0, s2, s0
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; CHECK-NEXT: vstr.16 s0, [r7]
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; CHECK-NEXT: adds r7, #2
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; CHECK-NEXT: le lr, .LBB1_5
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; CHECK-NEXT: .LBB1_6: @ %while.end
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; CHECK-NEXT: pop {r4, r5, r6, r7, pc}
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; CHECK-NEXT: .LBB1_7: @ %vector.ph
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; CHECK-NEXT: bic r6, r3, #7
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; CHECK-NEXT: movs r5, #1
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; CHECK-NEXT: sub.w r7, r6, #8
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; CHECK-NEXT: add.w r4, r1, r6, lsl #1
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; CHECK-NEXT: add.w r12, r0, r6, lsl #1
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; CHECK-NEXT: add.w lr, r5, r7, lsr #3
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; CHECK-NEXT: add.w r7, r2, r6, lsl #1
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; CHECK-NEXT: and r5, r3, #7
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; CHECK-NEXT: .LBB1_8: @ %vector.body
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; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: vldrh.u16 q0, [r0], #16
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; CHECK-NEXT: vldrh.u16 q1, [r1], #16
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; CHECK-NEXT: vadd.f16 q0, q1, q0
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; CHECK-NEXT: vstrb.8 q0, [r2], #16
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; CHECK-NEXT: le lr, .LBB1_8
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; CHECK-NEXT: @ %bb.9: @ %middle.block
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; CHECK-NEXT: cmp r6, r3
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; CHECK-NEXT: bne .LBB1_4
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; CHECK-NEXT: b .LBB1_6
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entry:
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%cmp.not6 = icmp eq i32 %blockSize, 0
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br i1 %cmp.not6, label %while.end, label %while.body.preheader
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while.body.preheader: ; preds = %entry
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%min.iters.check = icmp ult i32 %blockSize, 8
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br i1 %min.iters.check, label %while.body.preheader31, label %vector.memcheck
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vector.memcheck: ; preds = %while.body.preheader
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%scevgep = getelementptr half, half* %pDst, i32 %blockSize
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%scevgep14 = getelementptr half, half* %pSrcA, i32 %blockSize
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%scevgep17 = getelementptr half, half* %pSrcB, i32 %blockSize
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%bound0 = icmp ugt half* %scevgep14, %pDst
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%bound1 = icmp ugt half* %scevgep, %pSrcA
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%found.conflict = and i1 %bound0, %bound1
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%bound019 = icmp ugt half* %scevgep17, %pDst
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%bound120 = icmp ugt half* %scevgep, %pSrcB
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%found.conflict21 = and i1 %bound019, %bound120
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%conflict.rdx = or i1 %found.conflict, %found.conflict21
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br i1 %conflict.rdx, label %while.body.preheader31, label %vector.ph
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vector.ph: ; preds = %vector.memcheck
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%n.vec = and i32 %blockSize, -8
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%ind.end = and i32 %blockSize, 7
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%ind.end23 = getelementptr half, half* %pSrcA, i32 %n.vec
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%ind.end25 = getelementptr half, half* %pDst, i32 %n.vec
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%ind.end27 = getelementptr half, half* %pSrcB, i32 %n.vec
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br label %vector.body
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vector.body: ; preds = %vector.body, %vector.ph
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%index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
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%next.gep = getelementptr half, half* %pSrcA, i32 %index
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%next.gep28 = getelementptr half, half* %pDst, i32 %index
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%next.gep29 = getelementptr half, half* %pSrcB, i32 %index
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%0 = bitcast half* %next.gep to <8 x half>*
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%wide.load = load <8 x half>, <8 x half>* %0, align 2
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%1 = bitcast half* %next.gep29 to <8 x half>*
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%wide.load30 = load <8 x half>, <8 x half>* %1, align 2
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%2 = fadd fast <8 x half> %wide.load30, %wide.load
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%3 = bitcast half* %next.gep28 to <8 x half>*
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store <8 x half> %2, <8 x half>* %3, align 2
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%index.next = add i32 %index, 8
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%4 = icmp eq i32 %index.next, %n.vec
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br i1 %4, label %middle.block, label %vector.body
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middle.block: ; preds = %vector.body
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%cmp.n = icmp eq i32 %n.vec, %blockSize
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br i1 %cmp.n, label %while.end, label %while.body.preheader31
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while.body.preheader31: ; preds = %middle.block, %vector.memcheck, %while.body.preheader
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%blkCnt.010.ph = phi i32 [ %blockSize, %vector.memcheck ], [ %blockSize, %while.body.preheader ], [ %ind.end, %middle.block ]
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%pSrcA.addr.09.ph = phi half* [ %pSrcA, %vector.memcheck ], [ %pSrcA, %while.body.preheader ], [ %ind.end23, %middle.block ]
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%pDst.addr.08.ph = phi half* [ %pDst, %vector.memcheck ], [ %pDst, %while.body.preheader ], [ %ind.end25, %middle.block ]
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%pSrcB.addr.07.ph = phi half* [ %pSrcB, %vector.memcheck ], [ %pSrcB, %while.body.preheader ], [ %ind.end27, %middle.block ]
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br label %while.body
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while.body: ; preds = %while.body.preheader31, %while.body
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%blkCnt.010 = phi i32 [ %dec, %while.body ], [ %blkCnt.010.ph, %while.body.preheader31 ]
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%pSrcA.addr.09 = phi half* [ %incdec.ptr, %while.body ], [ %pSrcA.addr.09.ph, %while.body.preheader31 ]
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%pDst.addr.08 = phi half* [ %incdec.ptr3, %while.body ], [ %pDst.addr.08.ph, %while.body.preheader31 ]
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%pSrcB.addr.07 = phi half* [ %incdec.ptr1, %while.body ], [ %pSrcB.addr.07.ph, %while.body.preheader31 ]
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%incdec.ptr = getelementptr inbounds half, half* %pSrcA.addr.09, i32 1
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%5 = load half, half* %pSrcA.addr.09, align 2
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%incdec.ptr1 = getelementptr inbounds half, half* %pSrcB.addr.07, i32 1
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%6 = load half, half* %pSrcB.addr.07, align 2
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%7 = fadd fast half %6, %5
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%incdec.ptr3 = getelementptr inbounds half, half* %pDst.addr.08, i32 1
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store half %7, half* %pDst.addr.08, align 2
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%dec = add i32 %blkCnt.010, -1
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%cmp.not = icmp eq i32 %dec, 0
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br i1 %cmp.not, label %while.end, label %while.body
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while.end: ; preds = %while.body, %middle.block, %entry
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ret void
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}
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declare <8 x i1> @llvm.get.active.lane.mask.v8i1.i32(i32, i32) #1
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declare <8 x half> @llvm.masked.load.v8f16.p0v8f16(<8 x half>*, i32 immarg, <8 x i1>, <8 x half>) #2
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declare void @llvm.masked.store.v8f16.p0v8f16(<8 x half>, <8 x half>*, i32 immarg, <8 x i1>) #3
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