[polly] r250518 - Add testcase for r250517

[Michael Kruse via llvm-commits]

Author: meinersbur
Date: Fri Oct 16 10:17:26 2015
New Revision: 250518

URL: http://llvm.org/viewvc/llvm-project?rev=250518&view=rev
Log:
Add testcase for r250517


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

Added: polly/trunk/test/ScopInfo/exit_phi_accesses.ll
URL: http://llvm.org/viewvc/llvm-project/polly/trunk/test/ScopInfo/exit_phi_accesses.ll?rev=250518&view=auto
==============================================================================
--- polly/trunk/test/ScopInfo/exit_phi_accesses.ll (added)
+++ polly/trunk/test/ScopInfo/exit_phi_accesses.ll Fri Oct 16 10:17:26 2015
@@ -0,0 +1,44 @@
+; RUN: opt %loadPolly -analyze -polly-scops %s | FileCheck %s
+
+; Check that PHI nodes only create PHI access and nothing else (e.g. unnecessary
+; SCALAR accesses)In this case, for a PHI in the exit node, hence there is no
+; PHI ReadAccess.
+
+; CHECK-LABEL: Function: foo
+; CHECK:       Statements {
+; CHECK-NEXT:      Stmt_header
+; CHECK-NEXT:          Domain :=
+; CHECK-NEXT:              { Stmt_header[] };
+; CHECK-NEXT:          Schedule :=
+; CHECK-NEXT:              { Stmt_header[] -> [0, 0] };
+; CHECK-NEXT:          MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
+; CHECK-NEXT:              { Stmt_header[] -> MemRef_phi[] };
+; CHECK-NEXT:      Stmt_body
+; CHECK-NEXT:          Domain :=
+; CHECK-NEXT:              { Stmt_body[i0] : i0 <= 100 and i0 >= 0 };
+; CHECK-NEXT:          Schedule :=
+; CHECK-NEXT:              { Stmt_body[i0] -> [1, i0] };
+; CHECK-NEXT:          MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
+; CHECK-NEXT:              { Stmt_body[i0] -> MemRef_phi[] };
+; CHECK-NEXT:   }
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+
+define float @foo(float %sum, float* %A) {
+entry:
+  br label %header
+
+header:
+  br i1 true, label %body, label %exit
+
+body:
+  %i = phi i64 [ 0, %header ], [ %next, %body ]
+  %scalar = fadd float 0.0, 0.0
+  %next = add nuw nsw i64 %i, 1
+  %cond = icmp ne i64 %i, 100
+  br i1 %cond, label %body, label %exit
+
+exit:
+  %phi = phi float [%scalar, %body], [0.0, %header]
+  ret float %phi
+}