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authorBen Cheng <bccheng@google.com>2014-03-26 05:37:19 (GMT)
committerBen Cheng <bccheng@google.com>2014-03-26 05:37:19 (GMT)
commit1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch)
treec607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/vrp07.c
parent283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff)
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Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/vrp07.c')
-rw-r--r--gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/vrp07.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/vrp07.c b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/vrp07.c
new file mode 100644
index 0000000..6584919
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/vrp07.c
@@ -0,0 +1,39 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-vrp1-details" } */
+
+foo (int i, int *p)
+{
+ int j;
+
+ if (i > 10)
+ {
+ if (p)
+ {
+ j = *p;
+ /* This should be folded to if (1) because of the parent 'if
+ (p)'. But the dereference of p above does not need an
+ assertion. */
+ if (p)
+ return j + 1;
+ }
+ }
+ else
+ {
+ j = *p - 3;
+ /* This should be folded to if (0), because p has just been
+ dereferenced. But we were not inserting enough ASSERT_EXPRs
+ to figure it out. */
+ if (!p)
+ return j - 4;
+ }
+
+ return i;
+}
+/* Target with fno-delete-null-pointer-checks should not fold checks */
+/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 1" 1 "vrp1" } } */
+/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 0" 1 "vrp1" { target { ! keeps_null_pointer_checks } } } } */
+/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 0" 0 "vrp1" { target { keeps_null_pointer_checks } } } } */
+
+/* { dg-final { scan-tree-dump-times "PREDICATE: p_\[0-9\]" 2 "vrp1" { target { ! keeps_null_pointer_checks } } } } */
+/* { dg-final { scan-tree-dump-times "PREDICATE: p_\[0-9\]" 1 "vrp1" { target { keeps_null_pointer_checks } } } } */
+/* { dg-final { cleanup-tree-dump "vrp1" } } */