From: Segher Boessenkool <segher@kernel.crashing.org>
Date: Mon, 21 Nov 2016 15:15:21 +0000 (+0100)
Subject: Testcase for PR71785
X-Git-Tag: upstream/12.2.0~43132
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e51482c9c83406a928bef4c60f47a08a4232f379;p=platform%2Fupstream%2Fgcc.git

Testcase for PR71785


gcc/testsuite/
	PR rtl-optimization/71785
	* gcc.target/powerpc/pr71785.c: New file.

From-SVN: r242665
---

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 11f14f9..3f82737 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2016-11-21  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	PR rtl-optimization/71785
+	* gcc.target/powerpc/pr71785.c: New file.
+
 2016-11-21  Bin Cheng  <bin.cheng@arm.com>
 
 	PR testsuite/78114
diff --git a/gcc/testsuite/gcc.target/powerpc/pr71785.c b/gcc/testsuite/gcc.target/powerpc/pr71785.c
new file mode 100644
index 0000000..613dcd1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr71785.c
@@ -0,0 +1,52 @@
+/* { dg-do compile { target { powerpc*-*-* } } } */
+/* { dg-options "-O2" } */
+/* { dg-final { scan-assembler-not {\mb\M} } } */
+
+/* Check that all computed gotos in this testcase end up unfactored completely.
+   If some is not there will be a unconditional jump left; if all works fine,
+   all are gone.  */
+
+typedef enum opcode
+{
+	OP_A,
+	OP_B,
+	OP_END
+} opcode;
+
+typedef struct op
+{
+	opcode opcode;
+	int arg;
+} op;
+
+extern void do_stuff_b(int arg);
+extern void do_stuff_c(int arg);
+
+extern int someglobal;
+
+void
+eval(op *op)
+{
+	static const void *dispatch_table[] = {
+		&&CASE_OP_A,
+		&&CASE_OP_B,
+		&&CASE_OP_C,
+		&&CASE_OP_END
+	};
+
+	goto *dispatch_table[op->opcode];
+CASE_OP_A:
+	someglobal++;
+	op++;
+	goto *dispatch_table[op->opcode];
+CASE_OP_B:
+	do_stuff_b(op->arg);
+	op++;
+	goto *dispatch_table[op->opcode];
+CASE_OP_C:
+	do_stuff_c(op->arg);
+	op++;
+	goto *dispatch_table[op->opcode];
+CASE_OP_END:
+	return;
+}