[gcc(refs/vendors/ibm/heads/perf)] tree-optimization/93964 - adjust ISL code generation for pointer params

[Jiu Fu Guo]

https://gcc.gnu.org/g:dca54007ebb5d49c3d6cea63ee87fd8f3ccb9ca5

commit dca54007ebb5d49c3d6cea63ee87fd8f3ccb9ca5
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Mar 4 10:40:32 2020 +0100

    tree-optimization/93964 - adjust ISL code generation for pointer params
    
    Pointers eventually need intermediate conversions in code generation.
    Allowing them is much easier than fending them off since niter
    and scev expansion easily drag those in.
    
    2020-02-04  Richard Biener  <rguenther@suse.de>
    
            PR tree-optimization/93964
            * graphite-isl-ast-to-gimple.c
            (gcc_expression_from_isl_ast_expr_id): Add intermediate
            conversion for pointer to integer converts.
            * graphite-scop-detection.c (assign_parameter_index_in_region):
            Relax assert.
    
            * gcc.dg/graphite/pr93964.c: New testcase.

Diff:
---
 gcc/ChangeLog                           |  9 +++++++++
 gcc/graphite-isl-ast-to-gimple.c        |  3 +++
 gcc/graphite-scop-detection.c           |  1 -
 gcc/testsuite/ChangeLog                 |  5 +++++
 gcc/testsuite/gcc.dg/graphite/pr93964.c | 19 +++++++++++++++++++
 5 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a08bdaf8ecd..82b66089c8a 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2020-02-04  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/93964
+	* graphite-isl-ast-to-gimple.c
+	(gcc_expression_from_isl_ast_expr_id): Add intermediate
+	conversion for pointer to integer converts.
+	* graphite-scop-detection.c (assign_parameter_index_in_region):
+	Relax assert.
+
 2020-03-04  Martin Liska  <mliska@suse.cz>
 
 	PR c/93886
diff --git a/gcc/graphite-isl-ast-to-gimple.c b/gcc/graphite-isl-ast-to-gimple.c
index c08a259a80e..ef93fda2233 100644
--- a/gcc/graphite-isl-ast-to-gimple.c
+++ b/gcc/graphite-isl-ast-to-gimple.c
@@ -265,6 +265,9 @@ gcc_expression_from_isl_ast_expr_id (tree type,
   tree t = res->second;
   if (useless_type_conversion_p (type, TREE_TYPE (t)))
     return t;
+  if (POINTER_TYPE_P (TREE_TYPE (t))
+      && !POINTER_TYPE_P (type) && !ptrofftype_p (type))
+    t = fold_convert (sizetype, t);
   return fold_convert (type, t);
 }
 
diff --git a/gcc/graphite-scop-detection.c b/gcc/graphite-scop-detection.c
index ed12fea801b..75f81227f8a 100644
--- a/gcc/graphite-scop-detection.c
+++ b/gcc/graphite-scop-detection.c
@@ -1102,7 +1102,6 @@ static void
 assign_parameter_index_in_region (tree name, sese_info_p region)
 {
   gcc_assert (TREE_CODE (name) == SSA_NAME
-	      && INTEGRAL_TYPE_P (TREE_TYPE (name))
 	      && ! defined_in_sese_p (name, region->region));
   int i;
   tree p;
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index a13a0a4ba59..cbf17163195 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2020-02-04  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/93964
+	* gcc.dg/graphite/pr93964.c: New testcase.
+
 2020-03-04  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/94001
diff --git a/gcc/testsuite/gcc.dg/graphite/pr93964.c b/gcc/testsuite/gcc.dg/graphite/pr93964.c
new file mode 100644
index 00000000000..80fc523b855
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/graphite/pr93964.c
@@ -0,0 +1,19 @@
+/* { dg-do compile }  */
+/* { dg-options "-O -floop-nest-optimize" } */
+
+int *
+eo (void);
+
+void
+g4 (int *nt)
+{
+  int dh, t2 = (__INTPTR_TYPE__)eo ();
+
+  for (dh = 0; dh < 2; ++dh)
+    {
+      int m7;
+
+      for (m7 = 0; m7 < t2; ++m7)
+        nt[m7] = 0;
+    }
+}