derek.holloway
7502bf64a4
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121 lines
8.6 KiB
LLVM
121 lines
8.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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; Fold zeroing of inactive lanes into the gather's passthrough parameter.
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define <vscale x 2 x float> @masked_gather_and_zero_inactive_1(<vscale x 2 x ptr> %ptr, <vscale x 2 x i1> %mask) {
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; CHECK-LABEL: @masked_gather_and_zero_inactive_1(
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; CHECK-NEXT: [[GATHER:%.*]] = call <vscale x 2 x float> @llvm.masked.gather.nxv2f32.nxv2p0(<vscale x 2 x ptr> align 4 [[PTR:%.*]], <vscale x 2 x i1> [[MASK:%.*]], <vscale x 2 x float> zeroinitializer)
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; CHECK-NEXT: ret <vscale x 2 x float> [[GATHER]]
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;
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%gather = call <vscale x 2 x float> @llvm.masked.gather.nxv2f32(<vscale x 2 x ptr> %ptr, i32 4, <vscale x 2 x i1> %mask, <vscale x 2 x float> undef)
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%masked = select <vscale x 2 x i1> %mask, <vscale x 2 x float> %gather, <vscale x 2 x float> zeroinitializer
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ret <vscale x 2 x float> %masked
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}
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; As above but reuse the gather's existing passthrough.
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define <vscale x 2 x i32> @masked_gather_and_zero_inactive_2(<vscale x 2 x ptr> %ptr, <vscale x 2 x i1> %mask) {
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; CHECK-LABEL: @masked_gather_and_zero_inactive_2(
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; CHECK-NEXT: [[GATHER:%.*]] = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32.nxv2p0(<vscale x 2 x ptr> align 4 [[PTR:%.*]], <vscale x 2 x i1> [[MASK:%.*]], <vscale x 2 x i32> zeroinitializer)
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; CHECK-NEXT: ret <vscale x 2 x i32> [[GATHER]]
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;
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%gather = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32(<vscale x 2 x ptr> %ptr, i32 4, <vscale x 2 x i1> %mask, <vscale x 2 x i32> zeroinitializer)
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%masked = select <vscale x 2 x i1> %mask, <vscale x 2 x i32> %gather, <vscale x 2 x i32> zeroinitializer
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ret <vscale x 2 x i32> %masked
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}
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; No transform when the gather's passthrough cannot be reused or altered.
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define <vscale x 2 x i32> @masked_gather_and_zero_inactive_3(<vscale x 2 x ptr> %ptr, <vscale x 2 x i1> %mask, <vscale x 2 x i32> %passthrough) {
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; CHECK-LABEL: @masked_gather_and_zero_inactive_3(
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; CHECK-NEXT: [[GATHER:%.*]] = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32.nxv2p0(<vscale x 2 x ptr> align 4 [[PTR:%.*]], <vscale x 2 x i1> [[MASK:%.*]], <vscale x 2 x i32> [[PASSTHROUGH:%.*]])
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; CHECK-NEXT: [[MASKED:%.*]] = select <vscale x 2 x i1> [[MASK]], <vscale x 2 x i32> [[GATHER]], <vscale x 2 x i32> zeroinitializer
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; CHECK-NEXT: ret <vscale x 2 x i32> [[MASKED]]
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;
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%gather = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32(<vscale x 2 x ptr> %ptr, i32 4, <vscale x 2 x i1> %mask, <vscale x 2 x i32> %passthrough)
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%masked = select <vscale x 2 x i1> %mask, <vscale x 2 x i32> %gather, <vscale x 2 x i32> zeroinitializer
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ret <vscale x 2 x i32> %masked
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}
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; Remove redundant select when its mask doesn't overlap with the gather mask.
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define <vscale x 2 x i32> @masked_gather_and_zero_inactive_4(<vscale x 2 x ptr> %ptr, <vscale x 2 x i1> %inv_mask) {
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; CHECK-LABEL: @masked_gather_and_zero_inactive_4(
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; CHECK-NEXT: [[MASK:%.*]] = xor <vscale x 2 x i1> [[INV_MASK:%.*]], splat (i1 true)
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; CHECK-NEXT: [[GATHER:%.*]] = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32.nxv2p0(<vscale x 2 x ptr> align 4 [[PTR:%.*]], <vscale x 2 x i1> [[MASK]], <vscale x 2 x i32> zeroinitializer)
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; CHECK-NEXT: ret <vscale x 2 x i32> [[GATHER]]
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;
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%mask = xor <vscale x 2 x i1> %inv_mask, splat (i1 true)
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%gather = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32(<vscale x 2 x ptr> %ptr, i32 4, <vscale x 2 x i1> %mask, <vscale x 2 x i32> undef)
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%masked = select <vscale x 2 x i1> %inv_mask, <vscale x 2 x i32> zeroinitializer, <vscale x 2 x i32> %gather
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ret <vscale x 2 x i32> %masked
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}
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; As above but reuse the gather's existing passthrough.
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define <vscale x 2 x i32> @masked_gather_and_zero_inactive_5(<vscale x 2 x ptr> %ptr, <vscale x 2 x i1> %inv_mask) {
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; CHECK-LABEL: @masked_gather_and_zero_inactive_5(
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; CHECK-NEXT: [[MASK:%.*]] = xor <vscale x 2 x i1> [[INV_MASK:%.*]], splat (i1 true)
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; CHECK-NEXT: [[GATHER:%.*]] = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32.nxv2p0(<vscale x 2 x ptr> align 4 [[PTR:%.*]], <vscale x 2 x i1> [[MASK]], <vscale x 2 x i32> zeroinitializer)
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; CHECK-NEXT: ret <vscale x 2 x i32> [[GATHER]]
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;
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%mask = xor <vscale x 2 x i1> %inv_mask, splat (i1 true)
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%gather = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32(<vscale x 2 x ptr> %ptr, i32 4, <vscale x 2 x i1> %mask, <vscale x 2 x i32> zeroinitializer)
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%masked = select <vscale x 2 x i1> %inv_mask, <vscale x 2 x i32> zeroinitializer, <vscale x 2 x i32> %gather
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ret <vscale x 2 x i32> %masked
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}
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; No transform when the gather's passthrough cannot be reused or altered.
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define <vscale x 2 x i32> @masked_gather_and_zero_inactive_6(<vscale x 2 x ptr> %ptr, <vscale x 2 x i1> %inv_mask, <vscale x 2 x i32> %passthrough) {
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; CHECK-LABEL: @masked_gather_and_zero_inactive_6(
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; CHECK-NEXT: [[MASK:%.*]] = xor <vscale x 2 x i1> [[INV_MASK:%.*]], splat (i1 true)
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; CHECK-NEXT: [[GATHER:%.*]] = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32.nxv2p0(<vscale x 2 x ptr> align 4 [[PTR:%.*]], <vscale x 2 x i1> [[MASK]], <vscale x 2 x i32> [[PASSTHROUGH:%.*]])
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; CHECK-NEXT: [[MASKED:%.*]] = select <vscale x 2 x i1> [[INV_MASK]], <vscale x 2 x i32> zeroinitializer, <vscale x 2 x i32> [[GATHER]]
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; CHECK-NEXT: ret <vscale x 2 x i32> [[MASKED]]
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;
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%mask = xor <vscale x 2 x i1> %inv_mask, splat (i1 true)
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%gather = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32(<vscale x 2 x ptr> %ptr, i32 4, <vscale x 2 x i1> %mask, <vscale x 2 x i32> %passthrough)
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%masked = select <vscale x 2 x i1> %inv_mask, <vscale x 2 x i32> zeroinitializer, <vscale x 2 x i32> %gather
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ret <vscale x 2 x i32> %masked
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}
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; No transform when select and gather masks have no relation.
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define <vscale x 2 x i32> @masked_gather_and_zero_inactive_7(<vscale x 2 x ptr> %ptr, <vscale x 2 x i1> %mask1, <vscale x 2 x i1> %mask2) {
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; CHECK-LABEL: @masked_gather_and_zero_inactive_7(
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; CHECK-NEXT: [[GATHER:%.*]] = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32.nxv2p0(<vscale x 2 x ptr> align 4 [[PTR:%.*]], <vscale x 2 x i1> [[MASK1:%.*]], <vscale x 2 x i32> zeroinitializer)
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; CHECK-NEXT: [[MASKED:%.*]] = select <vscale x 2 x i1> [[MASK2:%.*]], <vscale x 2 x i32> zeroinitializer, <vscale x 2 x i32> [[GATHER]]
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; CHECK-NEXT: ret <vscale x 2 x i32> [[MASKED]]
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;
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%gather = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32(<vscale x 2 x ptr> %ptr, i32 4, <vscale x 2 x i1> %mask1, <vscale x 2 x i32> zeroinitializer)
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%masked = select <vscale x 2 x i1> %mask2, <vscale x 2 x i32> zeroinitializer, <vscale x 2 x i32> %gather
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ret <vscale x 2 x i32> %masked
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}
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; A more complex case where we can prove the select mask is a subset of the
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; gather's inactive lanes and thus the gather's passthrough takes effect.
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define <vscale x 2 x float> @masked_gather_and_zero_inactive_8(<vscale x 2 x ptr> %ptr, <vscale x 2 x i1> %inv_mask, <vscale x 2 x i1> %cond) {
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; CHECK-LABEL: @masked_gather_and_zero_inactive_8(
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; CHECK-NEXT: [[MASK:%.*]] = xor <vscale x 2 x i1> [[INV_MASK:%.*]], splat (i1 true)
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; CHECK-NEXT: [[PG:%.*]] = and <vscale x 2 x i1> [[COND:%.*]], [[MASK]]
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; CHECK-NEXT: [[GATHER:%.*]] = call <vscale x 2 x float> @llvm.masked.gather.nxv2f32.nxv2p0(<vscale x 2 x ptr> align 4 [[PTR:%.*]], <vscale x 2 x i1> [[PG]], <vscale x 2 x float> zeroinitializer)
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; CHECK-NEXT: ret <vscale x 2 x float> [[GATHER]]
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;
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%mask = xor <vscale x 2 x i1> %inv_mask, splat (i1 true)
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%pg = and <vscale x 2 x i1> %mask, %cond
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%gather = call <vscale x 2 x float> @llvm.masked.gather.nxv2f32(<vscale x 2 x ptr> %ptr, i32 4, <vscale x 2 x i1> %pg, <vscale x 2 x float> undef)
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%masked = select <vscale x 2 x i1> %inv_mask, <vscale x 2 x float> zeroinitializer, <vscale x 2 x float> %gather
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ret <vscale x 2 x float> %masked
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}
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define <vscale x 2 x float> @masked_load_and_scalar_select_cond(<vscale x 2 x ptr> %ptr, <vscale x 2 x i1> %mask, i1 %cond) {
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; CHECK-LABEL: @masked_load_and_scalar_select_cond(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = call <vscale x 2 x float> @llvm.masked.gather.nxv2f32.nxv2p0(<vscale x 2 x ptr> align 32 [[PTR:%.*]], <vscale x 2 x i1> [[MASK:%.*]], <vscale x 2 x float> undef)
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[COND:%.*]], <vscale x 2 x float> zeroinitializer, <vscale x 2 x float> [[TMP0]]
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; CHECK-NEXT: ret <vscale x 2 x float> [[TMP1]]
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;
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entry:
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%0 = call <vscale x 2 x float> @llvm.masked.gather.nxv2f32(<vscale x 2 x ptr> %ptr, i32 32, <vscale x 2 x i1> %mask, <vscale x 2 x float> undef)
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%1 = select i1 %cond, <vscale x 2 x float> zeroinitializer, <vscale x 2 x float> %0
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ret <vscale x 2 x float> %1
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}
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declare <vscale x 2 x i32> @llvm.masked.gather.nxv2i32(<vscale x 2 x ptr>, i32, <vscale x 2 x i1>, <vscale x 2 x i32>)
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declare <vscale x 2 x float> @llvm.masked.gather.nxv2f32(<vscale x 2 x ptr>, i32, <vscale x 2 x i1>, <vscale x 2 x float>)
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