# [polly] r210538 - Test delinearization of 2D diagonal matrix

Tobias Grosser tobias at grosser.es
Tue Jun 10 07:48:17 PDT 2014

```Author: grosser
Date: Tue Jun 10 09:48:17 2014
New Revision: 210538

URL: http://llvm.org/viewvc/llvm-project?rev=210538&view=rev
Log:
Test delinearization of 2D diagonal matrix

polly/trunk/test/ScopInfo/multidim_2d-diagonal-matrix.ll

URL: http://llvm.org/viewvc/llvm-project/polly/trunk/test/ScopInfo/multidim_2d-diagonal-matrix.ll?rev=210538&view=auto
==============================================================================
+++ polly/trunk/test/ScopInfo/multidim_2d-diagonal-matrix.ll Tue Jun 10 09:48:17 2014
@@ -0,0 +1,39 @@
+; RUN: opt %loadPolly -polly-scops -analyze -polly-delinearize < %s | FileCheck %s
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; Derived from the following code:
+;
+; void foo(long n, double A[n][n]) {
+;   for (long i = 0; i < n; i++)
+;     A[i][i] = 1.0;
+; }
+
+; CHECK: p0: %n
+; CHECK-NOT: p1
+
+; CHECK: Domain :=
+; CHECK:   [n] -> { Stmt_for_i[i0] : i0 >= 0 and i0 <= -1 + n };
+; CHECK: Scattering :=
+; CHECK:   [n] -> { Stmt_for_i[i0] -> scattering[0, i0, 0] };
+; CHECK: MustWriteAccess :=
+; CHECK:   [n] -> { Stmt_for_i[i0] -> MemRef_A[i0, i0] };
+
+
+define void @foo(i64 %n, double* %A) {
+entry:
+  br label %for.i
+
+for.i:
+  %i = phi i64 [ 0, %entry ], [ %i.inc, %for.i ]
+  %tmp = mul nsw i64 %i, %n
+  %vlaarrayidx.sum = add i64 %i, %tmp
+  %arrayidx = getelementptr inbounds double* %A, i64 %vlaarrayidx.sum
+  store double 1.0, double* %arrayidx
+  %i.inc = add nsw i64 %i, 1
+  %i.exitcond = icmp eq i64 %i.inc, %n
+  br i1 %i.exitcond, label %end, label %for.i
+
+end:
+  ret void
+}

```