From 156b431c6658b8a6d8fa6b10f111fab1262fd65b Mon Sep 17 00:00:00 2001 From: Florian Hahn Date: Tue, 6 Jul 2021 17:35:40 +0100 Subject: [PATCH] [LV] Add test with ptr induction used as scalar and vector. Test case inspired by D105199. --- .../Transforms/LoopVectorize/pointer-induction.ll | 93 ++++++++++++++++++++++ 1 file changed, 93 insertions(+) diff --git a/llvm/test/Transforms/LoopVectorize/pointer-induction.ll b/llvm/test/Transforms/LoopVectorize/pointer-induction.ll index c1ef506..828e72d 100644 --- a/llvm/test/Transforms/LoopVectorize/pointer-induction.ll +++ b/llvm/test/Transforms/LoopVectorize/pointer-induction.ll @@ -118,3 +118,96 @@ if.end: ; preds = %for.body, %if.then br i1 %cmp.not, label %for.cond.cleanup.loopexit, label %for.body } +; In the test below the pointer phi %ptr.iv.2 is used as +; 1. As a uniform address for the load, and +; 2. Non-uniform use by the getelementptr which is stored. This requires the +; vector value. +define void @pointer_induction_used_as_vector(i8** noalias %start.1, i8* noalias %start.2, i64 %N) { +; CHECK-LABEL: @pointer_induction_used_as_vector( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N:%.*]], 4 +; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]] +; CHECK: vector.ph: +; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N]], 4 +; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]] +; CHECK-NEXT: [[IND_END:%.*]] = getelementptr i8*, i8** [[START_1:%.*]], i64 [[N_VEC]] +; CHECK-NEXT: [[IND_END3:%.*]] = getelementptr i8, i8* [[START_2:%.*]], i64 [[N_VEC]] +; CHECK-NEXT: br label [[VECTOR_BODY:%.*]] +; CHECK: vector.body: +; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ] +; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0 +; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 0 +; CHECK-NEXT: [[NEXT_GEP:%.*]] = getelementptr i8*, i8** [[START_1]], i64 [[TMP1]] +; CHECK-NEXT: [[TMP2:%.*]] = add i64 [[INDEX]], 0 +; CHECK-NEXT: [[NEXT_GEP4:%.*]] = getelementptr i8, i8* [[START_2]], i64 [[TMP2]] +; CHECK-NEXT: [[TMP3:%.*]] = add i64 [[INDEX]], 1 +; CHECK-NEXT: [[NEXT_GEP5:%.*]] = getelementptr i8, i8* [[START_2]], i64 [[TMP3]] +; CHECK-NEXT: [[TMP4:%.*]] = add i64 [[INDEX]], 2 +; CHECK-NEXT: [[NEXT_GEP6:%.*]] = getelementptr i8, i8* [[START_2]], i64 [[TMP4]] +; CHECK-NEXT: [[TMP5:%.*]] = add i64 [[INDEX]], 3 +; CHECK-NEXT: [[NEXT_GEP7:%.*]] = getelementptr i8, i8* [[START_2]], i64 [[TMP5]] +; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i8, i8* [[NEXT_GEP4]], i64 1 +; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i8, i8* [[NEXT_GEP5]], i64 1 +; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds i8, i8* [[NEXT_GEP6]], i64 1 +; CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds i8, i8* [[NEXT_GEP7]], i64 1 +; CHECK-NEXT: [[TMP10:%.*]] = insertelement <4 x i8*> poison, i8* [[TMP6]], i32 0 +; CHECK-NEXT: [[TMP11:%.*]] = insertelement <4 x i8*> [[TMP10]], i8* [[TMP7]], i32 1 +; CHECK-NEXT: [[TMP12:%.*]] = insertelement <4 x i8*> [[TMP11]], i8* [[TMP8]], i32 2 +; CHECK-NEXT: [[TMP13:%.*]] = insertelement <4 x i8*> [[TMP12]], i8* [[TMP9]], i32 3 +; CHECK-NEXT: [[TMP14:%.*]] = getelementptr i8*, i8** [[NEXT_GEP]], i32 0 +; CHECK-NEXT: [[TMP15:%.*]] = bitcast i8** [[TMP14]] to <4 x i8*>* +; CHECK-NEXT: store <4 x i8*> [[TMP13]], <4 x i8*>* [[TMP15]], align 8 +; CHECK-NEXT: [[TMP16:%.*]] = getelementptr i8, i8* [[NEXT_GEP4]], i32 0 +; CHECK-NEXT: [[TMP17:%.*]] = bitcast i8* [[TMP16]] to <4 x i8>* +; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x i8>, <4 x i8>* [[TMP17]], align 1 +; CHECK-NEXT: [[TMP18:%.*]] = add <4 x i8> [[WIDE_LOAD]], +; CHECK-NEXT: [[TMP19:%.*]] = bitcast i8* [[TMP16]] to <4 x i8>* +; CHECK-NEXT: store <4 x i8> [[TMP18]], <4 x i8>* [[TMP19]], align 1 +; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4 +; CHECK-NEXT: [[TMP20:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]] +; CHECK-NEXT: br i1 [[TMP20]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]] +; CHECK: middle.block: +; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]] +; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]] +; CHECK: scalar.ph: +; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ] +; CHECK-NEXT: [[BC_RESUME_VAL1:%.*]] = phi i8** [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ [[START_1]], [[ENTRY]] ] +; CHECK-NEXT: [[BC_RESUME_VAL2:%.*]] = phi i8* [ [[IND_END3]], [[MIDDLE_BLOCK]] ], [ [[START_2]], [[ENTRY]] ] +; CHECK-NEXT: br label [[LOOP_BODY:%.*]] +; CHECK: loop.body: +; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP_BODY]] ] +; CHECK-NEXT: [[PTR_IV_1:%.*]] = phi i8** [ [[BC_RESUME_VAL1]], [[SCALAR_PH]] ], [ [[PTR_IV_1_NEXT:%.*]], [[LOOP_BODY]] ] +; CHECK-NEXT: [[PTR_IV_2:%.*]] = phi i8* [ [[BC_RESUME_VAL2]], [[SCALAR_PH]] ], [ [[PTR_IV_2_NEXT:%.*]], [[LOOP_BODY]] ] +; CHECK-NEXT: [[PTR_IV_1_NEXT]] = getelementptr inbounds i8*, i8** [[PTR_IV_1]], i64 1 +; CHECK-NEXT: [[PTR_IV_2_NEXT]] = getelementptr inbounds i8, i8* [[PTR_IV_2]], i64 1 +; CHECK-NEXT: store i8* [[PTR_IV_2_NEXT]], i8** [[PTR_IV_1]], align 8 +; CHECK-NEXT: [[LV:%.*]] = load i8, i8* [[PTR_IV_2]], align 1 +; CHECK-NEXT: [[ADD:%.*]] = add i8 [[LV]], 1 +; CHECK-NEXT: store i8 [[ADD]], i8* [[PTR_IV_2]], align 1 +; CHECK-NEXT: [[IV_NEXT]] = add nuw i64 [[IV]], 1 +; CHECK-NEXT: [[C:%.*]] = icmp ne i64 [[IV_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[C]], label [[LOOP_BODY]], label [[EXIT]], !llvm.loop [[LOOP5:![0-9]+]] +; CHECK: exit: +; CHECK-NEXT: ret void +; + +entry: + br label %loop.body + +loop.body: ; preds = %loop.body, %entry + %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.body ] + %ptr.iv.1 = phi i8** [ %start.1, %entry ], [ %ptr.iv.1.next, %loop.body ] + %ptr.iv.2 = phi i8* [ %start.2, %entry ], [ %ptr.iv.2.next, %loop.body ] + %ptr.iv.1.next = getelementptr inbounds i8*, i8** %ptr.iv.1, i64 1 + %ptr.iv.2.next = getelementptr inbounds i8, i8* %ptr.iv.2, i64 1 + store i8* %ptr.iv.2.next, i8** %ptr.iv.1, align 8 + %lv = load i8, i8* %ptr.iv.2, align 1 + %add = add i8 %lv, 1 + store i8 %add, i8* %ptr.iv.2, align 1 + %iv.next = add nuw i64 %iv, 1 + %c = icmp ne i64 %iv.next, %N + br i1 %c, label %loop.body, label %exit + +exit: ; preds = %loop.body + ret void +} -- 2.7.4