This patch adds 2 testcases. One tests that GCC is able to create
bit-test clusters of size 64. The other one contains two switches which
GCC wouldn't completely cover with bit-test clusters before the changes
from this patch set.
gcc/testsuite/ChangeLog:
* gcc.dg/tree-ssa/switch-5.c: New test.
* gcc.dg/tree-ssa/switch-6.c: New test.
Signed-off-by: Filip Kastl <fka...@suse.cz>
---
gcc/testsuite/gcc.dg/tree-ssa/switch-5.c | 60 ++++++++++++++++++++++++
gcc/testsuite/gcc.dg/tree-ssa/switch-6.c | 51 ++++++++++++++++++++
2 files changed, 111 insertions(+)
create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/switch-5.c
create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/switch-6.c
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/switch-5.c
b/gcc/testsuite/gcc.dg/tree-ssa/switch-5.c
new file mode 100644
index 00000000000..b05742cf153
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/switch-5.c
@@ -0,0 +1,60 @@
+/* { dg-do compile { target { { x86_64-*-* aarch64-*-* ia64-*-* powerpc64-*-*
} && lp64 } } } */
+/* { dg-options "-O2 -fdump-tree-switchlower1" } */
+
+int f0();
+int f1();
+int f2();
+int f3();
+int f4();
+
+int foo(int a)
+{
+ switch (a)
+ {
+ case 0:
+ case 2:
+ case 4:
+ case 6:
+ return f0();
+ case 8:
+ return f1();
+ case 10:
+ case 14:
+ case 16:
+ case 18:
+ return f2();
+ case 12:
+ return f3();
+ case 20:
+ return f4();
+ }
+ return -1;
+}
+
+/* { dg-final { scan-tree-dump ";; GIMPLE switch case clusters: BT:0-8
BT:10-20" "switchlower1" } } */
+
+int bar(int a)
+{
+ switch (a)
+ {
+ case 20:
+ case 18:
+ case 16:
+ case 14:
+ return f0();
+ case 12:
+ return f1();
+ case 10:
+ case 6:
+ case 4:
+ case 2:
+ return f2();
+ case 8:
+ return f3();
+ case 0:
+ return f4();
+ }
+ return -1;
+}
+
+/* { dg-final { scan-tree-dump ";; GIMPLE switch case clusters: BT:0-10
BT:12-20" "switchlower1" } } */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/switch-6.c
b/gcc/testsuite/gcc.dg/tree-ssa/switch-6.c
new file mode 100644
index 00000000000..bbbc87462c4
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/switch-6.c
@@ -0,0 +1,51 @@
+/* { dg-do compile { target { { x86_64-*-* aarch64-*-* ia64-*-* powerpc64-*-*
} && lp64 } } } */
+/* { dg-options "-O2 -fdump-tree-switchlower1 -fno-jump-tables" } */
+
+/* Test that bit-test switch lowering can create cluster of size 64 (there was
+ an of-by-one error causing it to only do 63 before). */
+
+int f();
+
+int foo(int a)
+{
+ switch (a)
+ {
+ case 0:
+ case 3:
+ case 5:
+ case 7:
+ case 9:
+ case 11:
+ case 13:
+ case 15:
+ case 17:
+ case 19:
+ case 21:
+ case 23:
+ case 25:
+ case 27:
+ case 29:
+ case 31:
+ case 33:
+ case 35:
+ case 37:
+ case 39:
+ case 41:
+ case 43:
+ case 45:
+ case 47:
+ case 49:
+ case 51:
+ case 53:
+ case 55:
+ case 57:
+ case 59:
+ case 61:
+ case 63:
+ return f();
+ default:
+ return -1;
+ }
+}
+
+/* { dg-final { scan-tree-dump ";; GIMPLE switch case clusters: BT:0-63"
"switchlower1" } } */
--
2.48.1
