[polly] r187772 - ScopInfo: add a testcase that share parameters within nested start.

[Tobias Grosser]

Author: grosser
Date: Mon Aug  5 23:36:45 2013
New Revision: 187772

URL: http://llvm.org/viewvc/llvm-project?rev=187772&view=rev
Log:
ScopInfo: add a testcase that share parameters within nested start.

Contributed-by:  Star Tan <tanmx_star at yeah.net>

Added:
    polly/trunk/test/ScopInfo/multidim_nested_start_share_parameter.ll

Added: polly/trunk/test/ScopInfo/multidim_nested_start_share_parameter.ll
URL: http://llvm.org/viewvc/llvm-project/polly/trunk/test/ScopInfo/multidim_nested_start_share_parameter.ll?rev=187772&view=auto
==============================================================================
--- polly/trunk/test/ScopInfo/multidim_nested_start_share_parameter.ll (added)
+++ polly/trunk/test/ScopInfo/multidim_nested_start_share_parameter.ll Mon Aug  5 23:36:45 2013
@@ -0,0 +1,92 @@
+; RUN: opt %loadPolly -polly-scops -analyze < %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"
+
+; void foo(long n, long m, long o, double A[n][m][o]) {
+;
+;   for (long i = 0; i < n; i++)
+;     for (long j = 0; j < m; j++)
+;       for (long k = 0; k < o; k++) {
+;         A[i+3][j-4][k+7] = 1.0;
+;         A[i+13][j-14][k+17] = 11.0;
+;       }
+; }
+;
+; Access function:
+;
+;   {{{(56 + (8 * (-4 + (3 * %m)) * %o) + %A),+,(8 * %m * %o)}<%for.i>,+,
+;      (8 * %o)}<%for.j>,+,8}<%for.k>
+;   {{{(136 + (8 * (-14 + (13 * %m)) * %o) + %A),+,(8 * %m * %o)}<%for.i>,+,
+;      (8 * %o)}<%for.j>,+,8}<%for.k>
+;
+; They should share the following parameters:
+;     p1: {0,+,(8 * %o)}<%for.j>
+;     p2: {0,+,(8 * %m * %o)}<%for.i>
+;
+
+define void @foo(i64 %n, i64 %m, i64 %o, double* %A) {
+entry:
+  br label %for.i
+
+for.i:
+  %i = phi i64 [ 0, %entry ], [ %i.inc, %for.i.inc ]
+  br label %for.j
+
+for.j:
+  %j = phi i64 [ 0, %for.i ], [ %j.inc, %for.j.inc ]
+  br label %for.k
+
+for.k:
+  %k = phi i64 [ 0, %for.j ], [ %k.inc, %for.k.inc ]
+
+  %offset0 = add nsw i64 %i, 3
+  %subscript0 = mul i64 %offset0, %m
+  %offset1 = add nsw i64 %j, -4
+  %subscript1 = add i64 %offset1, %subscript0
+  %subscript2 = mul i64 %subscript1, %o
+  %offset2 = add nsw i64 %k, 7
+  %subscript3 = add i64 %subscript2, %offset2
+  %idx = getelementptr inbounds double* %A, i64 %subscript3
+  store double 1.0, double* %idx
+
+  %offset3 = add nsw i64 %i, 13
+  %subscript4 = mul i64 %offset3, %m
+  %offset4 = add nsw i64 %j, -14
+  %subscript5 = add i64 %offset4, %subscript4
+  %subscript6 = mul i64 %subscript5, %o
+  %offset5 = add nsw i64 %k, 17
+  %subscript7 = add i64 %subscript6, %offset5
+  %idx1 = getelementptr inbounds double* %A, i64 %subscript7
+  store double 11.0, double* %idx1
+
+  br label %for.k.inc
+
+for.k.inc:
+  %k.inc = add nsw i64 %k, 1
+  %k.exitcond = icmp eq i64 %k.inc, %o
+  br i1 %k.exitcond, label %for.j.inc, label %for.k
+
+for.j.inc:
+  %j.inc = add nsw i64 %j, 1
+  %j.exitcond = icmp eq i64 %j.inc, %m
+  br i1 %j.exitcond, label %for.i.inc, label %for.j
+
+for.i.inc:
+  %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
+}
+
+; CHECK: p0: %o
+; CHECK: p1: {0,+,(8 * %o)}<%for.j>
+; CHECK: p2: {0,+,(8 * %m * %o)}<%for.i>
+; CHECK: p3: (8 * (-4 + (3 * %m)) * %o)
+; CHECK: p4: (8 * (-14 + (13 * %m)) * %o)
+; CHECK-NOT: p4
+
+; CHECK:   [o, p_1, p_2, p_3, p_4] -> { Stmt_for_k[i0] -> MemRef_A[o0] : 8o0 = 56 + p_1 + p_2 + p_3 + 8i0 };
+; CHECK:   [o, p_1, p_2, p_3, p_4] -> { Stmt_for_k[i0] -> MemRef_A[o0] : 8o0 = 136 + p_1 + p_2 + p_4 + 8i0 };
+