PowerPC, fix test gdb.arch/altivec-regs.exp

The test fails on Power 10 with the RHEL9 distro.  It also fails on
Power 9.

The test set a the breakpoint in main that stops at line:
a = 9; /* start here */.  The test then sets a break point at the same
line where it wants to start the test and does a continue.  GDB does not
stop again on the same line where it is stopped, but rather continues to
the end of the program.

Initialize variable A to zero so the break on main will stop before setting
a break point on line a = 9; /* start here */.

Make the match on the breakpoint number generic.

Patch has been tested on Power 10 with RHEL 9, Power 10 with Ubuntu 22.04,
and Power 9 with Fedora 36 with no regression failures.

diff --git a/gdb/testsuite/gdb.arch/altivec-regs.c b/gdb/testsuite/gdb.arch/altivec-regs.c
index 1411f15e3583ac1b6a6fff96a04bea2054a6777d..a838b28b9b51f8905eff14f01a3c3d8500a981c0 100644 (file)
--- a/gdb/testsuite/gdb.arch/altivec-regs.c
+++ b/gdb/testsuite/gdb.arch/altivec-regs.c
@@ -18,7 +18,7 @@ main ()
   vector unsigned int y; 
   vector unsigned int x; 
   vector unsigned int z; 
-  int a;
+  int a = 0;
 
   #ifdef _AIX
   /* On AIX, the debugger cannot access vector registers before they

diff --git a/gdb/testsuite/gdb.arch/altivec-regs.exp b/gdb/testsuite/gdb.arch/altivec-regs.exp
index b771a4df76f41129bd0e0db8e39f0ccfb43fae59..ece207be48ec1ce7153814436fef29661bac3f99 100644 (file)
--- a/gdb/testsuite/gdb.arch/altivec-regs.exp
+++ b/gdb/testsuite/gdb.arch/altivec-regs.exp
@@ -122,7 +122,7 @@ send_gdb "info vector\n"
 gdb_expect_list "info vector" ".*$gdb_prompt $" $pattern_list
 
 gdb_test "break vector_fun" \
- "Breakpoint 2 at.*altivec-regs.c, line \[0-9\]+\\." \
+ "Breakpoint $decimal at.*altivec-regs.c, line \[0-9\]+\\." \
  "set breakpoint at vector_fun"
 
 # Actually it is nuch easier to see these results printed in hex.
@@ -131,7 +131,7 @@ gdb_test "set output-radix 16" \
   "set output radix to hex"
 
 gdb_test "continue" \
-  "Breakpoint 2, vector_fun .a=.0xfefefefe, 0xfefefefe, 0xfefefefe, 0xfefefefe., b=.0x1010101, 0x1010101, 0x1010101, 0x1010101.*altivec-regs.c.*vec_splat_u8.2..;" \
+  "Breakpoint $decimal, vector_fun .a=.0xfefefefe, 0xfefefefe, 0xfefefefe, 0xfefefefe., b=.0x1010101, 0x1010101, 0x1010101, 0x1010101.*altivec-regs.c.*vec_splat_u8.2..;" \
   "continue to vector_fun"
 
 # Do a next over the assignment to vector 'a'.