[PATCH 6/7] testsuite: skip cmp-mem-const on alpha

Alpha does not narrow memory comparisons in combine, so the
"narrow comparison from mode .I to HI" scan never matches.  This is not
specific to byte/word memory access: -mbwx does not change it either.
Skip these tests the same way sparc and hppa already do.

gcc/testsuite/ChangeLog:

	* gcc.dg/cmp-mem-const-3.c: Skip on alpha.
	* gcc.dg/cmp-mem-const-4.c: Likewise.
	* gcc.dg/cmp-mem-const-5.c: Likewise.
	* gcc.dg/cmp-mem-const-6.c: Likewise.
---
 gcc/testsuite/gcc.dg/cmp-mem-const-3.c | 3 ++-
 gcc/testsuite/gcc.dg/cmp-mem-const-4.c | 3 ++-
 gcc/testsuite/gcc.dg/cmp-mem-const-5.c | 3 ++-
 gcc/testsuite/gcc.dg/cmp-mem-const-6.c | 3 ++-
 4 files changed, 8 insertions(+), 4 deletions(-)

diff --git ./gcc/testsuite/gcc.dg/cmp-mem-const-3.c ./gcc/testsuite/gcc.dg/cmp-mem-const-3.c
index 5469f10712e..bd19ffeb16c 100644
--- ./gcc/testsuite/gcc.dg/cmp-mem-const-3.c
+++ ./gcc/testsuite/gcc.dg/cmp-mem-const-3.c
@@ -1,6 +1,7 @@
-/* { dg-do compile { target { lp64 && { ! { sparc*-*-* hppa*-*-* } } } } } */
+/* { dg-do compile { target { lp64 && { ! { sparc*-*-* hppa*-*-* alpha*-*-* } } } } } */
 /* Excluding sparc since there we do not end up with a comparison of memory and
    a constant which means that the optimization is not applicable.  */
+/* Excluding alpha since memory comparisons are not narrowed there.  */
 /* { dg-options "-O2 -fdump-rtl-combine-details" } */
 /* { dg-final { scan-rtl-dump "narrow comparison from mode .I to HI" "combine" } } */
 
diff --git ./gcc/testsuite/gcc.dg/cmp-mem-const-4.c ./gcc/testsuite/gcc.dg/cmp-mem-const-4.c
index 9ea094e20eb..ff318e513ef 100644
--- ./gcc/testsuite/gcc.dg/cmp-mem-const-4.c
+++ ./gcc/testsuite/gcc.dg/cmp-mem-const-4.c
@@ -1,6 +1,7 @@
-/* { dg-do compile { target { lp64 && { ! { sparc*-*-* hppa*-*-* } } } } } */
+/* { dg-do compile { target { lp64 && { ! { sparc*-*-* hppa*-*-* alpha*-*-* } } } } } */
 /* Excluding sparc since there we do not end up with a comparison of memory and
    a constant which means that the optimization is not applicable.  */
+/* Excluding alpha since memory comparisons are not narrowed there.  */
 /* { dg-options "-O2 -fdump-rtl-combine-details" } */
 /* { dg-final { scan-rtl-dump "narrow comparison from mode .I to HI" "combine" } } */
 
diff --git ./gcc/testsuite/gcc.dg/cmp-mem-const-5.c ./gcc/testsuite/gcc.dg/cmp-mem-const-5.c
index 5a9096ef84d..1e3d530b99e 100644
--- ./gcc/testsuite/gcc.dg/cmp-mem-const-5.c
+++ ./gcc/testsuite/gcc.dg/cmp-mem-const-5.c
@@ -1,6 +1,7 @@
-/* { dg-do compile { target { lp64 && { ! { sparc*-*-* hppa*-*-* } } } } } */
+/* { dg-do compile { target { lp64 && { ! { sparc*-*-* hppa*-*-* alpha*-*-* } } } } } */
 /* Excluding sparc since there a prior optimization already reduced the
    constant, i.e., nothing left for us.  */
+/* Excluding alpha since memory comparisons are not narrowed there.  */
 /* { dg-options "-O2 -fdump-rtl-combine-details" } */
 /* { dg-final { scan-rtl-dump "narrow comparison from mode .I to SI" "combine" } } */
 
diff --git ./gcc/testsuite/gcc.dg/cmp-mem-const-6.c ./gcc/testsuite/gcc.dg/cmp-mem-const-6.c
index 381195361e0..c1d0124f9d2 100644
--- ./gcc/testsuite/gcc.dg/cmp-mem-const-6.c
+++ ./gcc/testsuite/gcc.dg/cmp-mem-const-6.c
@@ -1,6 +1,7 @@
-/* { dg-do compile { target { lp64 && { ! { sparc*-*-* hppa*-*-* } } } } } */
+/* { dg-do compile { target { lp64 && { ! { sparc*-*-* hppa*-*-* alpha*-*-* } } } } } */
 /* Excluding sparc since there a prior optimization already reduced the
    constant, i.e., nothing left for us.  */
+/* Excluding alpha since memory comparisons are not narrowed there.  */
 /* { dg-options "-O2 -fdump-rtl-combine-details" } */
 /* { dg-final { scan-rtl-dump "narrow comparison from mode .I to SI" "combine" } } */
 
-- 
2.54.0