4f86aa650c
This patch adds a new option to the LoopVectorizer to control how
scalable vectors can be used.
Initially, this suggests three levels to control scalable
vectorization, although other more aggressive options can be added in
the future.
The possible options are:
- Disabled: Disables vectorization with scalable vectors.
- Enabled: Vectorize loops using scalable vectors or fixed-width
vectors, but favors fixed-width vectors when the cost
is a tie.
- Preferred: Like 'Enabled', but favoring scalable vectors when the
cost-model is inconclusive.
Reviewed By: paulwalker-arm, vkmr
Differential Revision: https://reviews.llvm.org/D101945
61 lines
3.7 KiB
LLVM
61 lines
3.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -loop-vectorize -force-target-supports-scalable-vectors=true -scalable-vectorization=on -S | FileCheck %s
|
|
|
|
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
|
|
|
|
define i8 @reduction_add_trunc(i8* noalias nocapture %A) {
|
|
; CHECK-LABEL: @reduction_add_trunc(
|
|
; CHECK: vector.body:
|
|
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, %vector.ph ], [ [[INDEX_NEXT:%.*]], %vector.body ]
|
|
; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <vscale x 8 x i32> [ insertelement (<vscale x 8 x i32> zeroinitializer, i32 255, i32 0), %vector.ph ], [ [[TMP34:%.*]], %vector.body ]
|
|
; CHECK-NEXT: [[VEC_PHI1:%.*]] = phi <vscale x 8 x i32> [ zeroinitializer, %vector.ph ], [ [[TMP36:%.*]], %vector.body ]
|
|
; CHECK: [[TMP14:%.*]] = and <vscale x 8 x i32> [[VEC_PHI]], shufflevector (<vscale x 8 x i32> insertelement (<vscale x 8 x i32> poison, i32 255, i32 0), <vscale x 8 x i32> poison, <vscale x 8 x i32> zeroinitializer)
|
|
; CHECK-NEXT: [[TMP15:%.*]] = and <vscale x 8 x i32> [[VEC_PHI1]], shufflevector (<vscale x 8 x i32> insertelement (<vscale x 8 x i32> poison, i32 255, i32 0), <vscale x 8 x i32> poison, <vscale x 8 x i32> zeroinitializer)
|
|
; CHECK: [[WIDE_LOAD:%.*]] = load <vscale x 8 x i8>, <vscale x 8 x i8>*
|
|
; CHECK: [[WIDE_LOAD2:%.*]] = load <vscale x 8 x i8>, <vscale x 8 x i8>*
|
|
; CHECK-NEXT: [[TMP26:%.*]] = zext <vscale x 8 x i8> [[WIDE_LOAD]] to <vscale x 8 x i32>
|
|
; CHECK-NEXT: [[TMP27:%.*]] = zext <vscale x 8 x i8> [[WIDE_LOAD2]] to <vscale x 8 x i32>
|
|
; CHECK-NEXT: [[TMP28:%.*]] = add <vscale x 8 x i32> [[TMP14]], [[TMP26]]
|
|
; CHECK-NEXT: [[TMP29:%.*]] = add <vscale x 8 x i32> [[TMP15]], [[TMP27]]
|
|
; CHECK-NEXT: [[TMP30:%.*]] = call i32 @llvm.vscale.i32()
|
|
; CHECK-NEXT: [[TMP31:%.*]] = mul i32 [[TMP30]], 16
|
|
; CHECK-NEXT: [[INDEX_NEXT]] = add i32 [[INDEX]], [[TMP31]]
|
|
; CHECK-NEXT: [[TMP32:%.*]] = icmp eq i32 [[INDEX_NEXT]], {{%.*}}
|
|
; CHECK-NEXT: [[TMP33:%.*]] = trunc <vscale x 8 x i32> [[TMP28]] to <vscale x 8 x i8>
|
|
; CHECK-NEXT: [[TMP34]] = zext <vscale x 8 x i8> [[TMP33]] to <vscale x 8 x i32>
|
|
; CHECK-NEXT: [[TMP35:%.*]] = trunc <vscale x 8 x i32> [[TMP29]] to <vscale x 8 x i8>
|
|
; CHECK-NEXT: [[TMP36]] = zext <vscale x 8 x i8> [[TMP35]] to <vscale x 8 x i32>
|
|
; CHECK: middle.block:
|
|
; CHECK-NEXT: [[TMP37:%.*]] = trunc <vscale x 8 x i32> [[TMP34]] to <vscale x 8 x i8>
|
|
; CHECK-NEXT: [[TMP38:%.*]] = trunc <vscale x 8 x i32> [[TMP36]] to <vscale x 8 x i8>
|
|
; CHECK-NEXT: [[BIN_RDX:%.*]] = add <vscale x 8 x i8> [[TMP38]], [[TMP37]]
|
|
; CHECK-NEXT: [[TMP39:%.*]] = call i8 @llvm.vector.reduce.add.nxv8i8(<vscale x 8 x i8> [[BIN_RDX]])
|
|
; CHECK-NEXT: [[TMP40:%.*]] = zext i8 [[TMP39]] to i32
|
|
;
|
|
entry:
|
|
br label %loop
|
|
|
|
loop: ; preds = %entry, %loop
|
|
%indvars.iv = phi i32 [ %indvars.iv.next, %loop ], [ 0, %entry ]
|
|
%sum.02p = phi i32 [ %l9, %loop ], [ 255, %entry ]
|
|
%sum.02 = and i32 %sum.02p, 255
|
|
%l2 = getelementptr inbounds i8, i8* %A, i32 %indvars.iv
|
|
%l3 = load i8, i8* %l2, align 4
|
|
%l3e = zext i8 %l3 to i32
|
|
%l9 = add i32 %sum.02, %l3e
|
|
%indvars.iv.next = add i32 %indvars.iv, 1
|
|
%exitcond = icmp eq i32 %indvars.iv.next, 256
|
|
br i1 %exitcond, label %exit, label %loop, !llvm.loop !0
|
|
|
|
exit: ; preds = %loop
|
|
%sum.0.lcssa = phi i32 [ %l9, %loop ]
|
|
%ret = trunc i32 %sum.0.lcssa to i8
|
|
ret i8 %ret
|
|
}
|
|
|
|
!0 = distinct !{!0, !1, !2, !3, !4}
|
|
!1 = !{!"llvm.loop.vectorize.width", i32 8}
|
|
!2 = !{!"llvm.loop.vectorize.scalable.enable", i1 true}
|
|
!3 = !{!"llvm.loop.interleave.count", i32 2}
|
|
!4 = !{!"llvm.loop.vectorize.enable", i1 true}
|