112 lines
3.9 KiB
LLVM
112 lines
3.9 KiB
LLVM
; RUN: opt -S -slp-vectorizer -slp-threshold=-18 -dce -instcombine < %s | FileCheck %s
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target datalayout = "e-m:e-i32:64-i128:128-n32:64-S128"
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target triple = "aarch64--linux-gnu"
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; These tests check that we remove from consideration pairs of seed
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; getelementptrs when they are known to have a constant difference. Such pairs
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; are likely not good candidates for vectorization since one can be computed
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; from the other. We use an unprofitable threshold to force vectorization.
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;
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; int getelementptr(int *g, int n, int w, int x, int y, int z) {
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; int sum = 0;
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; for (int i = 0; i < n ; ++i) {
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; sum += g[2*i + w]; sum += g[2*i + x];
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; sum += g[2*i + y]; sum += g[2*i + z];
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; }
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; return sum;
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; }
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;
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; CHECK-LABEL: @getelementptr_4x32
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;
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; CHECK: [[A:%[a-zA-Z0-9.]+]] = add nsw <4 x i32>
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; CHECK: [[X:%[a-zA-Z0-9.]+]] = extractelement <4 x i32> [[A]]
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; CHECK: sext i32 [[X]] to i64
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;
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define i32 @getelementptr_4x32(i32* nocapture readonly %g, i32 %n, i32 %x, i32 %y, i32 %z) {
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entry:
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%cmp31 = icmp sgt i32 %n, 0
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br i1 %cmp31, label %for.body.preheader, label %for.cond.cleanup
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for.body.preheader:
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br label %for.body
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for.cond.cleanup.loopexit:
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br label %for.cond.cleanup
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for.cond.cleanup:
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%sum.0.lcssa = phi i32 [ 0, %entry ], [ %add16, %for.cond.cleanup.loopexit ]
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ret i32 %sum.0.lcssa
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for.body:
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%indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%sum.032 = phi i32 [ 0, %for.body.preheader ], [ %add16, %for.body ]
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%t4 = shl nsw i32 %indvars.iv, 1
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%t5 = add nsw i32 %t4, 0
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%arrayidx = getelementptr inbounds i32, i32* %g, i32 %t5
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%t6 = load i32, i32* %arrayidx, align 4
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%add1 = add nsw i32 %t6, %sum.032
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%t7 = add nsw i32 %t4, %x
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%arrayidx5 = getelementptr inbounds i32, i32* %g, i32 %t7
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%t8 = load i32, i32* %arrayidx5, align 4
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%add6 = add nsw i32 %add1, %t8
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%t9 = add nsw i32 %t4, %y
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%arrayidx10 = getelementptr inbounds i32, i32* %g, i32 %t9
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%t10 = load i32, i32* %arrayidx10, align 4
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%add11 = add nsw i32 %add6, %t10
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%t11 = add nsw i32 %t4, %z
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%arrayidx15 = getelementptr inbounds i32, i32* %g, i32 %t11
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%t12 = load i32, i32* %arrayidx15, align 4
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%add16 = add nsw i32 %add11, %t12
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%indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
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%exitcond = icmp eq i32 %indvars.iv.next , %n
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br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
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}
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; CHECK-LABEL: @getelementptr_2x32
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;
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; CHECK: [[A:%[a-zA-Z0-9.]+]] = add nsw <2 x i32>
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; CHECK: [[X:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> [[A]]
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; CHECK: sext i32 [[X]] to i64
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;
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define i32 @getelementptr_2x32(i32* nocapture readonly %g, i32 %n, i32 %x, i32 %y, i32 %z) {
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entry:
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%cmp31 = icmp sgt i32 %n, 0
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br i1 %cmp31, label %for.body.preheader, label %for.cond.cleanup
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for.body.preheader:
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br label %for.body
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for.cond.cleanup.loopexit:
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br label %for.cond.cleanup
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for.cond.cleanup:
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%sum.0.lcssa = phi i32 [ 0, %entry ], [ %add16, %for.cond.cleanup.loopexit ]
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ret i32 %sum.0.lcssa
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for.body:
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%indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%sum.032 = phi i32 [ 0, %for.body.preheader ], [ %add16, %for.body ]
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%t4 = shl nsw i32 %indvars.iv, 1
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%t5 = add nsw i32 %t4, 0
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%arrayidx = getelementptr inbounds i32, i32* %g, i32 %t5
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%t6 = load i32, i32* %arrayidx, align 4
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%add1 = add nsw i32 %t6, %sum.032
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%t7 = add nsw i32 %t4, 1
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%arrayidx5 = getelementptr inbounds i32, i32* %g, i32 %t7
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%t8 = load i32, i32* %arrayidx5, align 4
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%add6 = add nsw i32 %add1, %t8
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%t9 = add nsw i32 %t4, %y
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%arrayidx10 = getelementptr inbounds i32, i32* %g, i32 %t9
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%t10 = load i32, i32* %arrayidx10, align 4
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%add11 = add nsw i32 %add6, %t10
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%t11 = add nsw i32 %t4, %z
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%arrayidx15 = getelementptr inbounds i32, i32* %g, i32 %t11
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%t12 = load i32, i32* %arrayidx15, align 4
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%add16 = add nsw i32 %add11, %t12
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%indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
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%exitcond = icmp eq i32 %indvars.iv.next , %n
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br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
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}
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