diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index df49b0b1ad7..7441093cde3 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,10 @@
+2019-11-01  Kewen Lin  <linkw@gcc.gnu.org>
+
+	PR testsuite/92127
+	* gcc.dg/vect/costmodel/ppc/costmodel-pr37194.c: Disable unroll.
+	* gcc.dg/vect/costmodel/ppc/costmodel-fast-math-vect-pr29925.c:
+	Likewise.
+
 2019-10-31  Alexandre Oliva <oliva@adacore.com>
 
 	* gcc.misc-tests/help.exp: Test --help=common for full sentences.
diff --git a/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-fast-math-vect-pr29925.c b/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-fast-math-vect-pr29925.c
index a3662e267fc..34445dc6e82 100644
--- a/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-fast-math-vect-pr29925.c
+++ b/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-fast-math-vect-pr29925.c
@@ -13,6 +13,8 @@ interp_pitch(float *exc, float *interp, int pitch, int len)
    for (i=0;i<len;i++)
    {
       float tmp = 0;
+      /* PR92127, disable unroll to avoid unexpected profit calculation.  */
+      #pragma GCC unroll 0
       for (k=0;k<7;k++)
       {
          tmp += exc[i-pitch+k+maxj-6];
diff --git a/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-pr37194.c b/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-pr37194.c
index f2395fc6807..c37e73e1e5c 100644
--- a/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-pr37194.c
+++ b/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-pr37194.c
@@ -9,6 +9,8 @@ ggSpectrum_Set8(float * data, float d)
 {
    int i;
 
+   /* PR92127, disable unroll to avoid unexpected profit calculation.  */
+   #pragma GCC unroll 0
    for (i = 0; i < 8; i++)
       data[i] = d;
 }