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; RUN: opt -passes=loop-vectorize -vectorizer-maximize-bandwidth -mcpu=corei7-avx -debug-only=loop-vectorize -S < %s 2>&1 | FileCheck %s --check-prefix=CHECK-AVX1
; RUN: opt -passes=loop-vectorize -vectorizer-maximize-bandwidth -mcpu=core-avx2 -debug-only=loop-vectorize -S < %s 2>&1 | FileCheck %s --check-prefix=CHECK-AVX2
; REQUIRES: asserts
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@a = global [1000 x i8] zeroinitializer, align 16
@b = global [1000 x i8] zeroinitializer, align 16
@c = global [1000 x i8] zeroinitializer, align 16
@u = global [1000 x i32] zeroinitializer, align 16
@v = global [1000 x i32] zeroinitializer, align 16
@w = global [1000 x i32] zeroinitializer, align 16
; Tests that the vectorization factor is determined by the smallest instead of
; widest type in the loop for maximum bandwidth when
; -vectorizer-maximize-bandwidth is indicated.
;
; CHECK-LABEL: foo
; CHECK-AVX1: LV: Selecting VF: 16.
; CHECK-AVX2: LV: Selecting VF: 32.
define void @foo() {
entry:
br label %for.body
for.cond.cleanup:
ret void
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds [1000 x i8], ptr @b, i64 0, i64 %indvars.iv
%0 = load i8, ptr %arrayidx, align 1
%arrayidx2 = getelementptr inbounds [1000 x i8], ptr @c, i64 0, i64 %indvars.iv
%1 = load i8, ptr %arrayidx2, align 1
%add = add i8 %1, %0
%arrayidx6 = getelementptr inbounds [1000 x i8], ptr @a, i64 0, i64 %indvars.iv
store i8 %add, ptr %arrayidx6, align 1
%arrayidx8 = getelementptr inbounds [1000 x i32], ptr @v, i64 0, i64 %indvars.iv
%2 = load i32, ptr %arrayidx8, align 4
%arrayidx10 = getelementptr inbounds [1000 x i32], ptr @w, i64 0, i64 %indvars.iv
%3 = load i32, ptr %arrayidx10, align 4
%add11 = add nsw i32 %3, %2
%arrayidx13 = getelementptr inbounds [1000 x i32], ptr @u, i64 0, i64 %indvars.iv
store i32 %add11, ptr %arrayidx13, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, 1000
br i1 %exitcond, label %for.cond.cleanup, label %for.body
}
; We should not choose a VF larger than the constant TC.
; VF chosen should be atmost 16 (not the max possible vector width = 32 for AVX2)
define void @not_too_small_tc(ptr noalias nocapture %A, ptr noalias nocapture readonly %B) {
; CHECK-LABEL: not_too_small_tc
; CHECK-AVX2: LV: Selecting VF: 16.
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds i8, ptr %B, i64 %indvars.iv
%l1 = load i8, ptr %arrayidx, align 4, !llvm.access.group !13
%arrayidx2 = getelementptr inbounds i8, ptr %A, i64 %indvars.iv
%l2 = load i8, ptr %arrayidx2, align 4, !llvm.access.group !13
%add = add i8 %l1, %l2
store i8 %add, ptr %arrayidx2, align 4, !llvm.access.group !13
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, 16
br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !4
for.end:
ret void
}
!3 = !{!3, !{!"llvm.loop.parallel_accesses", !13}}
!4 = !{!4}
!13 = distinct !{}
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