diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index dac673c..46d281a 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -17333,6 +17333,24 @@ rs6000_gimple_fold_builtin (gimple_stmt_iterator *gsi)
 	gsi_replace (gsi, g, true);
 	return true;
       }
+    /* flavors of vec_abs. */
+    case ALTIVEC_BUILTIN_ABS_V16QI:
+    case ALTIVEC_BUILTIN_ABS_V8HI:
+    case ALTIVEC_BUILTIN_ABS_V4SI:
+    case ALTIVEC_BUILTIN_ABS_V4SF:
+    case P8V_BUILTIN_ABS_V2DI:
+    case VSX_BUILTIN_XVABSDP:
+      {
+	arg0 = gimple_call_arg (stmt, 0);
+	if ( INTEGRAL_TYPE_P (TREE_TYPE (TREE_TYPE(arg0)))
+	    && ! TYPE_OVERFLOW_WRAPS (TREE_TYPE (TREE_TYPE(arg0))))
+	      return false;
+	lhs = gimple_call_lhs (stmt);
+	gimple *g = gimple_build_assign (lhs, ABS_EXPR, arg0);
+	gimple_set_location (g, gimple_location (stmt));
+	gsi_replace (gsi, g, true);
+	return true;
+      }
     default:
       break;
     }
diff --git a/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-char-fwrapv.c b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-char-fwrapv.c
new file mode 100644
index 0000000..739f06e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-char-fwrapv.c
@@ -0,0 +1,18 @@
+/* Verify that overloaded built-ins for vec_abs with char
+   inputs produce the right results.  */
+
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_altivec_ok } */
+/* { dg-options "-maltivec -O2 -fwrapv" } */
+
+#include <altivec.h>
+
+vector signed char
+test2 (vector signed char x)
+{
+  return vec_abs (x);
+}
+
+/* { dg-final { scan-assembler-times "vspltisw|vxor" 1 } } */
+/* { dg-final { scan-assembler-times "vsububm" 1 } } */
+/* { dg-final { scan-assembler-times "vmaxsb" 1 } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-char.c b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-char.c
new file mode 100644
index 0000000..239c919
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-char.c
@@ -0,0 +1,18 @@
+/* Verify that overloaded built-ins for vec_abs with char
+   inputs produce the right results.  */
+
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_altivec_ok } */
+/* { dg-options "-maltivec -O2" } */
+
+#include <altivec.h>
+
+vector signed char
+test2 (vector signed char x)
+{
+  return vec_abs (x);
+}
+
+/* { dg-final { scan-assembler-times "vspltisw|vxor" 1 } } */
+/* { dg-final { scan-assembler-times "vsububm" 1 } } */
+/* { dg-final { scan-assembler-times "vmaxsb" 1 } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-floatdouble.c b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-floatdouble.c
new file mode 100644
index 0000000..1a08618
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-floatdouble.c
@@ -0,0 +1,23 @@
+/* Verify that overloaded built-ins for vec_abs with float and
+   double inputs for VSX produce the right results.  */
+
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_vsx_ok } */
+/* { dg-options "-mvsx -O2" } */
+
+#include <altivec.h>
+
+vector float
+test1 (vector float x)
+{
+  return vec_abs (x);
+}
+
+vector double
+test2 (vector double x)
+{
+  return vec_abs (x);
+}
+
+/* { dg-final { scan-assembler-times "xvabssp" 1 } } */
+/* { dg-final { scan-assembler-times "xvabsdp" 1 } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-int-fwrapv.c b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-int-fwrapv.c
new file mode 100644
index 0000000..34dead4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-int-fwrapv.c
@@ -0,0 +1,18 @@
+/* Verify that overloaded built-ins for vec_abs with int
+   inputs produce the right results.  */
+
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_altivec_ok } */
+/* { dg-options "-maltivec -O2 -fwrapv" } */
+
+#include <altivec.h>
+
+vector signed int
+test1 (vector signed int x)
+{
+  return vec_abs (x);
+}
+
+/* { dg-final { scan-assembler-times "vspltisw|vxor" 1 } } */
+/* { dg-final { scan-assembler-times "vsubuwm" 1 } } */
+/* { dg-final { scan-assembler-times "vmaxsw" 1 } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-int.c b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-int.c
new file mode 100644
index 0000000..77d9ca5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-int.c
@@ -0,0 +1,18 @@
+/* Verify that overloaded built-ins for vec_abs with int
+   inputs produce the right results.  */
+
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_altivec_ok } */
+/* { dg-options "-maltivec -O2" } */
+
+#include <altivec.h>
+
+vector signed int
+test1 (vector signed int x)
+{
+  return vec_abs (x);
+}
+
+/* { dg-final { scan-assembler-times "vspltisw|vxor" 1 } } */
+/* { dg-final { scan-assembler-times "vsubuwm" 1 } } */
+/* { dg-final { scan-assembler-times "vmaxsw" 1 } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-longlong-fwrapv.c b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-longlong-fwrapv.c
new file mode 100644
index 0000000..934618b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-longlong-fwrapv.c
@@ -0,0 +1,18 @@
+/* Verify that overloaded built-ins for vec_abs with long long
+   inputs produce the right results.  */
+
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_p8vector_ok } */
+/* { dg-options "-mpower8-vector -O2 -fwrapv" } */
+
+#include <altivec.h>
+
+vector signed long long
+test3 (vector signed long long x)
+{
+  return vec_abs (x);
+}
+
+/* { dg-final { scan-assembler-times "vspltisw|vxor" 1 } } */
+/* { dg-final { scan-assembler-times "vsubudm" 1 } } */
+/* { dg-final { scan-assembler-times "vmaxsd" 1 } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-longlong.c b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-longlong.c
new file mode 100644
index 0000000..5b59d19
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-longlong.c
@@ -0,0 +1,18 @@
+/* Verify that overloaded built-ins for vec_abs with long long
+   inputs produce the right results.  */
+
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_p8vector_ok } */
+/* { dg-options "-mpower8-vector -O2" } */
+
+#include <altivec.h>
+
+vector signed long long
+test3 (vector signed long long x)
+{
+  return vec_abs (x);
+}
+
+/* { dg-final { scan-assembler-times "vspltisw|vxor" 1 } } */
+/* { dg-final { scan-assembler-times "vsubudm" 1 } } */
+/* { dg-final { scan-assembler-times "vmaxsd" 1 } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-short-fwrapv.c b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-short-fwrapv.c
new file mode 100644
index 0000000..2562179
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-short-fwrapv.c
@@ -0,0 +1,18 @@
+/* Verify that overloaded built-ins for vec_abs with short
+   inputs produce the right results.  */
+
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_altivec_ok } */
+/* { dg-options "-maltivec -O2 -fwrapv" } */
+
+#include <altivec.h>
+
+vector signed short
+test3 (vector signed short x)
+{
+  return vec_abs (x);
+}
+
+/* { dg-final { scan-assembler-times "vspltisw|vxor" 1 } } */
+/* { dg-final { scan-assembler-times "vsubuhm" 1 } } */
+/* { dg-final { scan-assembler-times "vmaxsh" 1 } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-short.c b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-short.c
new file mode 100644
index 0000000..d312000
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/fold-vec-abs-short.c
@@ -0,0 +1,18 @@
+/* Verify that overloaded built-ins for vec_abs with short
+   inputs produce the right results.  */
+
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_altivec_ok } */
+/* { dg-options "-maltivec -O2" } */
+
+#include <altivec.h>
+
+vector signed short
+test3 (vector signed short x)
+{
+  return vec_abs (x);
+}
+
+/* { dg-final { scan-assembler-times "vspltisw|vxor" 1 } } */
+/* { dg-final { scan-assembler-times "vsubuhm" 1 } } */
+/* { dg-final { scan-assembler-times "vmaxsh" 1 } } */
