86813aa786
Epilogue vectorization currently relies on the resume phi for the canonical induction being always available, which is why VPPhi are considered to have side-effects, to prevent their removal. This patch adds a new ResumeForEpilogue opcode to mark the resume phi as used for epilogue vectorization. This allows treating VPPhis in general as not having side-effects, enabling removal of unused VPPhis.
73 lines
3.6 KiB
LLVM
73 lines
3.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -p loop-vectorize -mcpu=z16 -force-target-instruction-cost=1 -S %s | FileCheck %s
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target triple = "systemz-unknown-linux-unknown"
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define void @test_scalar_steps_target_instruction_cost(ptr %dst) {
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; CHECK-LABEL: define void @test_scalar_steps_target_instruction_cost(
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; CHECK-SAME: ptr [[DST:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
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; CHECK: [[VECTOR_PH]]:
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; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
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; CHECK: [[VECTOR_BODY]]:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_STORE_CONTINUE2:.*]] ]
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; CHECK-NEXT: [[OFFSET_IDX:%.*]] = mul i64 [[INDEX]], 3
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; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[INDEX]], i64 0
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; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i64> [[BROADCAST_SPLATINSERT]], <2 x i64> poison, <2 x i32> zeroinitializer
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; CHECK-NEXT: [[VEC_IV:%.*]] = add <2 x i64> [[BROADCAST_SPLAT]], <i64 0, i64 1>
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; CHECK-NEXT: [[TMP0:%.*]] = icmp ule <2 x i64> [[VEC_IV]], splat (i64 8)
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; CHECK-NEXT: [[TMP1:%.*]] = extractelement <2 x i1> [[TMP0]], i32 0
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; CHECK-NEXT: br i1 [[TMP1]], label %[[PRED_STORE_IF:.*]], label %[[PRED_STORE_CONTINUE:.*]]
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; CHECK: [[PRED_STORE_IF]]:
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; CHECK-NEXT: [[TMP2:%.*]] = add i64 [[OFFSET_IDX]], 0
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; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i64, ptr [[DST]], i64 [[TMP2]]
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; CHECK-NEXT: store i64 [[TMP2]], ptr [[TMP3]], align 8
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; CHECK-NEXT: br label %[[PRED_STORE_CONTINUE]]
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; CHECK: [[PRED_STORE_CONTINUE]]:
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; CHECK-NEXT: [[TMP4:%.*]] = extractelement <2 x i1> [[TMP0]], i32 1
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; CHECK-NEXT: br i1 [[TMP4]], label %[[PRED_STORE_IF1:.*]], label %[[PRED_STORE_CONTINUE2]]
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; CHECK: [[PRED_STORE_IF1]]:
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; CHECK-NEXT: [[TMP5:%.*]] = add i64 [[OFFSET_IDX]], 3
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; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i64, ptr [[DST]], i64 [[TMP5]]
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; CHECK-NEXT: store i64 [[TMP5]], ptr [[TMP6]], align 8
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; CHECK-NEXT: br label %[[PRED_STORE_CONTINUE2]]
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; CHECK: [[PRED_STORE_CONTINUE2]]:
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
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; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i64 [[INDEX_NEXT]], 10
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; CHECK-NEXT: br i1 [[TMP7]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
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; CHECK: [[MIDDLE_BLOCK]]:
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; CHECK-NEXT: br label %[[EXIT:.*]]
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; CHECK: [[SCALAR_PH]]:
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; CHECK-NEXT: br label %[[LOOP:.*]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i64, ptr [[DST]], i64 [[IV]]
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; CHECK-NEXT: store i64 [[IV]], ptr [[GEP]], align 8
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; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 3
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], 22
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; CHECK-NEXT: br i1 [[CMP]], label %[[LOOP]], label %[[EXIT]], !llvm.loop [[LOOP3:![0-9]+]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
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%gep = getelementptr inbounds i64, ptr %dst, i64 %iv
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store i64 %iv, ptr %gep, align 8
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%iv.next = add nuw nsw i64 %iv, 3
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%cmp = icmp ult i64 %iv, 22
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br i1 %cmp, label %loop, label %exit
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exit:
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ret void
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}
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;.
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; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
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; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
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; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}
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; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META2]], [[META1]]}
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;.
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