Committing.
Segher
2018-07-30 Segher Boessenkool <seg...@kernel.crashing.org>
gcc/testsuite/
PR rtl-optimization/85160
* gcc.target/powerpc/combine-2-2.c: New testcase.
---
gcc/testsuite/gcc.target/powerpc/combine-2-2.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/powerpc/combine-2-2.c
diff --git a/gcc/testsuite/gcc.target/powerpc/combine-2-2.c
b/gcc/testsuite/gcc.target/powerpc/combine-2-2.c
new file mode 100644
index 0000000..234476d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/combine-2-2.c
@@ -0,0 +1,17 @@
+/* { dg-options "-O2" } */
+
+/* PR85160 */
+
+/* Originally, the "x >> 14" are CSEd away (eventually becoming a srawi
+ instruction), and the two ANDs remain separate instructions because
+ combine cannot deal with this.
+
+ Now that combine knows how to combine two RTL insns into two, it manages
+ to make this just the sum of two rlwinm instructions. */
+
+int f(int x)
+{
+ return ((x >> 14) & 6) + ((x >> 14) & 4);
+}
+
+/* { dg-final { scan-assembler-not {\msrawi\M} } } */
--
1.8.3.1
