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; RUN: opt -basicaa -loop-distribute -enable-loop-distribute -verify-loop-info -verify-dom-info -S \
; RUN: < %s | FileCheck %s
; RUN: opt -basicaa -loop-distribute -enable-loop-distribute -verify-loop-info -verify-dom-info \
; RUN: -loop-accesses -analyze < %s | FileCheck %s --check-prefix=ANALYSIS
; RUN: opt -basicaa -loop-distribute -enable-loop-distribute -loop-vectorize -force-vector-width=4 -S \
; RUN: < %s | FileCheck %s --check-prefix=VECTORIZE
; We should distribute this loop into a safe (2nd statement) and unsafe loop
; (1st statement):
; for (i = 0; i < n; i++) {
; A[i + 1] = A[i] * B[i];
; =======================
; C[i] = D[i] * E[i];
; }
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.10.0"
define void @f(i32* noalias %a,
i32* noalias %b,
i32* noalias %c,
i32* noalias %d,
i32* noalias %e) {
entry:
br label %for.body
; Verify the two distributed loops.
; CHECK: entry.split.ldist1:
; CHECK: br label %for.body.ldist1
; CHECK: for.body.ldist1:
; CHECK: %mulA.ldist1 = mul i32 %loadB.ldist1, %loadA.ldist1
; CHECK: br i1 %exitcond.ldist1, label %entry.split, label %for.body.ldist1
; CHECK: entry.split:
; CHECK: br label %for.body
; CHECK: for.body:
; CHECK: %mulC = mul i32 %loadD, %loadE
; CHECK: for.end:
; ANALYSIS: for.body:
; ANALYSIS-NEXT: Memory dependences are safe{{$}}
; ANALYSIS: for.body.ldist1:
; ANALYSIS-NEXT: Report: unsafe dependent memory operations in loop
; VECTORIZE: mul <4 x i32>
for.body: ; preds = %for.body, %entry
%ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
%arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
%loadA = load i32, i32* %arrayidxA, align 4
%arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind
%loadB = load i32, i32* %arrayidxB, align 4
%mulA = mul i32 %loadB, %loadA
%add = add nuw nsw i64 %ind, 1
%arrayidxA_plus_4 = getelementptr inbounds i32, i32* %a, i64 %add
store i32 %mulA, i32* %arrayidxA_plus_4, align 4
%arrayidxD = getelementptr inbounds i32, i32* %d, i64 %ind
%loadD = load i32, i32* %arrayidxD, align 4
%arrayidxE = getelementptr inbounds i32, i32* %e, i64 %ind
%loadE = load i32, i32* %arrayidxE, align 4
%mulC = mul i32 %loadD, %loadE
%arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind
store i32 %mulC, i32* %arrayidxC, align 4
%exitcond = icmp eq i64 %add, 20
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
ret void
}
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