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Add test case forgotten in r265379. 

Thanks Johannes for reminding me.

llvm-svn: 265423
This commit is contained in:
Tobias Grosser 2016-04-05 17:40:07 +00:00
parent 0036ac4236
commit 6a44b7fdf0
1 changed files with 52 additions and 0 deletions
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52
polly/test/ScopInfo/multidim_fixedsize_multi_offset.ll Normal file
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; RUN: opt %loadPolly -polly-detect -analyze < %s | FileCheck %s -check-prefix=DETECT
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
;
; DETECT: Valid Region for Scop: for.cond => for.end
; CHECK-NOT: Region: %for.cond---%for.end
;
; void f(int A[][2]) {
; int(*B)[2] = &A[0][0];
; int(*C)[2] = &A[1][0];
; for (int i = 0; i < 100; i++) {
; B[i][0]++;
; C[i][0]++;
; }
; }
;
; This test case makes sure we do not miss parts of the array subscript
; functions, which we previously did by only considering the first of a chain
; of GEP instructions. Today, we detect this situation and do not delinearize
; the relevant memory access. In the future, we may want to detect this
; pattern and combine multiple GEP functions together.
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define void @f([2 x i32]* %A) {
entry:
%arrayidx3 = getelementptr inbounds [2 x i32], [2 x i32]* %A, i64 1, i64 0
%tmp = bitcast i32* %arrayidx3 to [2 x i32]*
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
%exitcond = icmp ne i64 %indvars.iv, 100
br i1 %exitcond, label %for.body, label %for.end
for.body: ; preds = %for.cond
%arrayidx5 = getelementptr inbounds [2 x i32], [2 x i32]* %A, i64 %indvars.iv, i64 0
%tmp1 = load i32, i32* %arrayidx5, align 4
%inc = add nsw i32 %tmp1, 1
store i32 %inc, i32* %arrayidx5, align 4
%arrayidx8 = getelementptr inbounds [2 x i32], [2 x i32]* %tmp, i64 %indvars.iv, i64 0
%tmp2 = load i32, i32* %arrayidx8, align 4
%inc9 = add nsw i32 %tmp2, 1
store i32 %inc9, i32* %arrayidx8, align 4
br label %for.inc
for.inc: ; preds = %for.body
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
br label %for.cond
for.end: ; preds = %for.cond
ret void
}