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; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s --check-prefix=SCOP
; RUN: opt %loadPolly -polly-codegen -S < %s | FileCheck %s
;
; This caused the code generation to emit a broken module as there are two
; dependences that need to be considered, thus code has to be emitted in a
; certain order:
; 1) To preload A[N * M] the expression N * M [p0] is needed (both for the
; condition under which A[N * M] is executed as well as to compute the
; index).
; 2) To generate (A[N * M] / 2) [p1] the preloaded value is needed.
;
; SCOP: p0: (%N * %M)
; SCOP: p1: (zext i32 (%tmp4 /u 2) to i64)
;
; CHECK: polly.preload.merge:
; CHECK: %polly.preload.tmp4.merge = phi i32 [ %polly.access.A.load, %polly.preload.exec ], [ 0, %polly.preload.cond ]
; CHECK: %3 = lshr i32 %polly.preload.tmp4.merge, 1
; CHECK: %4 = zext i32 %3 to i64
;
; void f(int *restrict A, int *restrict B, int N, int M) {
;
; for (int i = 0; i < N * M; i++)
; for (int j = 0; j < A[N * M] / 2; j++)
; B[i + j]++;
; }
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define void @f(i32* noalias %A, i32* noalias %B, i32 %N, i32 %M) {
entry:
br label %for.cond
for.cond: ; preds = %for.inc.8, %entry
%indvars.iv2 = phi i64 [ %indvars.iv.next3, %for.inc.8 ], [ 0, %entry ]
%mul = mul nsw i32 %N, %M
%tmp = sext i32 %mul to i64
%cmp = icmp slt i64 %indvars.iv2, %tmp
br i1 %cmp, label %for.body, label %for.end.10
for.body: ; preds = %for.cond
br label %for.cond.1
for.cond.1: ; preds = %for.inc, %for.body
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %for.body ]
%mul2 = mul nsw i32 %N, %M
%idxprom = sext i32 %mul2 to i64
%arrayidx = getelementptr inbounds i32, i32* %A, i64 %idxprom
%tmp4 = load i32, i32* %arrayidx, align 4
%div = udiv i32 %tmp4, 2
%tmp5 = sext i32 %div to i64
%cmp3 = icmp slt i64 %indvars.iv, %tmp5
br i1 %cmp3, label %for.body.4, label %for.end
for.body.4: ; preds = %for.cond.1
%tmp6 = add nsw i64 %indvars.iv2, %indvars.iv
%arrayidx6 = getelementptr inbounds i32, i32* %B, i64 %tmp6
%tmp7 = load i32, i32* %arrayidx6, align 4
%inc = add nsw i32 %tmp7, 1
store i32 %inc, i32* %arrayidx6, align 4
br label %for.inc
for.inc: ; preds = %for.body.4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
br label %for.cond.1
for.end: ; preds = %for.cond.1
br label %for.inc.8
for.inc.8: ; preds = %for.end
%indvars.iv.next3 = add nuw nsw i64 %indvars.iv2, 1
br label %for.cond
for.end.10: ; preds = %for.cond
ret void
}
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