diff gcc/testsuite/gcc.dg/tree-ssa/popcount5.c @ 19:2b5abeee2509 default tip

update gcc11
author anatofuz
date Mon, 25 May 2020 07:50:57 +0900
parents
children
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/tree-ssa/popcount5.c	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,22 @@
+/* PR tree-optimization/94800 */
+/* { dg-do compile } */
+/* { dg-require-effective-target popcount } */
+/* { dg-require-effective-target int32plus } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+const unsigned m1  = 0x55555555UL;
+const unsigned m2  = 0x33333333UL;
+const unsigned m4  = 0x0F0F0F0FUL;
+const int shift = 24;
+
+int popcount64c(unsigned x)
+{
+    x -= (x >> 1) & m1;
+    x = (x & m2) + ((x >> 2) & m2);
+    x = (x + (x >> 4)) & m4;
+    x += (x << 8);
+    x += (x << 16);
+    return x >> shift;
+}
+
+/* { dg-final { scan-tree-dump-times "\.POPCOUNT" 1 "optimized" } } */