[PATCH v2 1/8] gdb/testsuite: Add Windows replacement for aligned_alloc

_aligned_malloc has swapped arguments, and you have to use _aligned_free
to free the memory afterwards.

This is enough to make i386-sse.exp pass, and i386-avx.exp will pass at
the end of this series.
---
v2:
  - Mention which test pass after the change in the commit message
---
 gdb/testsuite/gdb.arch/i386-avx.c         |  2 +-
 gdb/testsuite/gdb.arch/i386-sse.c         |  2 +-
 gdb/testsuite/lib/precise-aligned-alloc.c | 20 ++++++++++++++++++++
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/gdb/testsuite/gdb.arch/i386-avx.c b/gdb/testsuite/gdb.arch/i386-avx.c
index b6cd89e5bea..229093e5164 100644
--- a/gdb/testsuite/gdb.arch/i386-avx.c
+++ b/gdb/testsuite/gdb.arch/i386-avx.c
@@ -116,7 +116,7 @@ main (int argc, char **argv)
 
   puts ("Bye!"); /* second breakpoint here */
 
-  free (allocated_ptr);
+  aligned_free (allocated_ptr);
 
   return 0;
 }
diff --git a/gdb/testsuite/gdb.arch/i386-sse.c b/gdb/testsuite/gdb.arch/i386-sse.c
index 21264ed74e7..5210aee12c3 100644
--- a/gdb/testsuite/gdb.arch/i386-sse.c
+++ b/gdb/testsuite/gdb.arch/i386-sse.c
@@ -134,7 +134,7 @@ main (int argc, char **argv)
       puts ("Bye!"); /* second breakpoint here */
     }
 
-  free (allocated_ptr);
+  aligned_free (allocated_ptr);
 
   return 0;
 }
diff --git a/gdb/testsuite/lib/precise-aligned-alloc.c b/gdb/testsuite/lib/precise-aligned-alloc.c
index 888814f12ef..1db35528bc8 100644
--- a/gdb/testsuite/lib/precise-aligned-alloc.c
+++ b/gdb/testsuite/lib/precise-aligned-alloc.c
@@ -21,6 +21,26 @@
 #include <string.h>
 #include <stdint.h>
 
+#ifdef _WIN32
+static void *
+aligned_alloc (size_t alignment, size_t size)
+{
+  return _aligned_malloc (size, alignment);
+}
+
+static void
+aligned_free (void *ptr)
+{
+  _aligned_free (ptr);
+}
+#else
+static void
+aligned_free (void *ptr)
+{
+  free (ptr);
+}
+#endif
+
 /* Return true if address P is ALIGNMENT-byte aligned.  */
 
 static int
-- 
2.54.0