7786ac8377
With t2DoLoopDec we can be left with some extra MOV's in the preheaders of tail predicated loops. This removes them, in the same way we remove other dead variables. Differential Revision: https://reviews.llvm.org/D91857
100 lines
5.1 KiB
LLVM
100 lines
5.1 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-none-eabi -mattr=+mve.fp -verify-machineinstrs -tail-predication=enabled -o - %s | FileCheck %s
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%struct.SpeexPreprocessState_ = type { i32, i32, half*, half* }
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define void @foo(%struct.SpeexPreprocessState_* nocapture readonly %st, i16* %x) {
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; CHECK-LABEL: foo:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r4, lr}
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; CHECK-NEXT: push {r4, lr}
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; CHECK-NEXT: ldrd r12, r2, [r0]
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; CHECK-NEXT: ldrd r4, r3, [r0, #8]
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; CHECK-NEXT: rsb r12, r12, r2, lsl #1
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; CHECK-NEXT: dlstp.16 lr, r12
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; CHECK-NEXT: .LBB0_1: @ %do.body
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; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: vldrh.u16 q0, [r3], #16
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; CHECK-NEXT: vstrh.16 q0, [r4], #16
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; CHECK-NEXT: letp lr, .LBB0_1
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; CHECK-NEXT: @ %bb.2: @ %do.end
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; CHECK-NEXT: ldr r2, [r0]
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; CHECK-NEXT: ldr r0, [r0, #8]
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; CHECK-NEXT: vmov.i16 q0, #0x1800
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; CHECK-NEXT: add.w r0, r0, r12, lsl #1
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; CHECK-NEXT: dlstp.16 lr, r2
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; CHECK-NEXT: .LBB0_3: @ %do.body6
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; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: vldrh.u16 q1, [r1], #16
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; CHECK-NEXT: vcvt.f16.s16 q1, q1
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; CHECK-NEXT: vmul.f16 q1, q1, q0
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; CHECK-NEXT: vstrh.16 q1, [r0], #16
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; CHECK-NEXT: letp lr, .LBB0_3
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; CHECK-NEXT: @ %bb.4: @ %do.end13
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; CHECK-NEXT: pop {r4, pc}
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entry:
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%ps_size = getelementptr inbounds %struct.SpeexPreprocessState_, %struct.SpeexPreprocessState_* %st, i32 0, i32 1
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%0 = load i32, i32* %ps_size, align 4
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%mul = shl nsw i32 %0, 1
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%frame_size = getelementptr inbounds %struct.SpeexPreprocessState_, %struct.SpeexPreprocessState_* %st, i32 0, i32 0
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%1 = load i32, i32* %frame_size, align 4
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%sub = sub nsw i32 %mul, %1
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%inbuf = getelementptr inbounds %struct.SpeexPreprocessState_, %struct.SpeexPreprocessState_* %st, i32 0, i32 3
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%2 = load half*, half** %inbuf, align 4
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%frame = getelementptr inbounds %struct.SpeexPreprocessState_, %struct.SpeexPreprocessState_* %st, i32 0, i32 2
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%3 = load half*, half** %frame, align 4
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br label %do.body
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do.body: ; preds = %do.body, %entry
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%pinbuff16.0 = phi half* [ %2, %entry ], [ %add.ptr, %do.body ]
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%blkCnt.0 = phi i32 [ %sub, %entry ], [ %sub2, %do.body ]
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%pframef16.0 = phi half* [ %3, %entry ], [ %add.ptr1, %do.body ]
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%4 = tail call <8 x i1> @llvm.arm.mve.vctp16(i32 %blkCnt.0)
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%5 = bitcast half* %pinbuff16.0 to <8 x half>*
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%6 = tail call fast <8 x half> @llvm.masked.load.v8f16.p0v8f16(<8 x half>* %5, i32 2, <8 x i1> %4, <8 x half> zeroinitializer)
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%7 = bitcast half* %pframef16.0 to <8 x half>*
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tail call void @llvm.masked.store.v8f16.p0v8f16(<8 x half> %6, <8 x half>* %7, i32 2, <8 x i1> %4)
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%add.ptr = getelementptr inbounds half, half* %pinbuff16.0, i32 8
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%add.ptr1 = getelementptr inbounds half, half* %pframef16.0, i32 8
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%sub2 = add nsw i32 %blkCnt.0, -8
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%cmp = icmp sgt i32 %blkCnt.0, 8
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br i1 %cmp, label %do.body, label %do.end
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do.end: ; preds = %do.body
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%8 = load half*, half** %frame, align 4
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%add.ptr4 = getelementptr inbounds half, half* %8, i32 %sub
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%9 = load i32, i32* %frame_size, align 4
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br label %do.body6
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do.body6: ; preds = %do.body6, %do.end
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%px.0 = phi i16* [ %x, %do.end ], [ %add.ptr8, %do.body6 ]
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%blkCnt.1 = phi i32 [ %9, %do.end ], [ %sub10, %do.body6 ]
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%pframef16.1 = phi half* [ %add.ptr4, %do.end ], [ %add.ptr9, %do.body6 ]
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%10 = tail call <8 x i1> @llvm.arm.mve.vctp16(i32 %blkCnt.1)
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%11 = bitcast i16* %px.0 to <8 x i16>*
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%12 = tail call <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>* %11, i32 2, <8 x i1> %10, <8 x i16> zeroinitializer)
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%13 = tail call fast <8 x half> @llvm.arm.mve.vcvt.fp.int.predicated.v8f16.v8i16.v8i1(<8 x i16> %12, i32 0, <8 x i1> %10, <8 x half> undef)
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%14 = tail call fast <8 x half> @llvm.arm.mve.mul.predicated.v8f16.v8i1(<8 x half> %13, <8 x half> <half 0xH1800, half 0xH1800, half 0xH1800, half 0xH1800, half 0xH1800, half 0xH1800, half 0xH1800, half 0xH1800>, <8 x i1> %10, <8 x half> undef)
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%15 = bitcast half* %pframef16.1 to <8 x half>*
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tail call void @llvm.masked.store.v8f16.p0v8f16(<8 x half> %14, <8 x half>* %15, i32 2, <8 x i1> %10)
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%add.ptr8 = getelementptr inbounds i16, i16* %px.0, i32 8
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%add.ptr9 = getelementptr inbounds half, half* %pframef16.1, i32 8
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%sub10 = add nsw i32 %blkCnt.1, -8
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%cmp12 = icmp sgt i32 %blkCnt.1, 8
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br i1 %cmp12, label %do.body6, label %do.end13
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do.end13: ; preds = %do.body6
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ret void
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}
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declare <8 x i1> @llvm.arm.mve.vctp16(i32)
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declare <8 x half> @llvm.masked.load.v8f16.p0v8f16(<8 x half>*, i32 immarg, <8 x i1>, <8 x half>)
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declare void @llvm.masked.store.v8f16.p0v8f16(<8 x half>, <8 x half>*, i32 immarg, <8 x i1>)
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declare <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>*, i32 immarg, <8 x i1>, <8 x i16>)
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declare <8 x half> @llvm.arm.mve.vcvt.fp.int.predicated.v8f16.v8i16.v8i1(<8 x i16>, i32, <8 x i1>, <8 x half>)
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declare <8 x half> @llvm.arm.mve.mul.predicated.v8f16.v8i1(<8 x half>, <8 x half>, <8 x i1>, <8 x half>)
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