[gcc(refs/users/meissner/heads/work151-dmf)] Merge commit 'refs/users/meissner/heads/work151-dmf' of git+ssh://gcc.gnu.org/git/gcc into me/work15

[Michael Meissner]

https://gcc.gnu.org/g:c06e0a9a23d4a629064edf28a1d66ac22467a7d4

commit c06e0a9a23d4a629064edf28a1d66ac22467a7d4
Merge: 940b89bf208 49674839adb
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Wed Jan 3 15:47:19 2024 -0500

    Merge commit 'refs/users/meissner/heads/work151-dmf' of git+ssh://gcc.gnu.org/git/gcc into me/work151-dmf

Diff:

 gcc/ChangeLog.meissner | 2 ++
 gcc/REVISION           | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --cc gcc/ChangeLog.meissner
index 4615579d615,03f1de9a1e3..28ce37f047e
--- a/gcc/ChangeLog.meissner
+++ b/gcc/ChangeLog.meissner
@@@ -1,124 -1,5 +1,126 @@@
 +==================== Branch work151, patch #1 ====================
 +
 +Power10: Add options to disable load and store vector pair.
 +
 +This is version 2 of the patch to add -mno-load-vector-pair and
 +-mno-store-vector-pair undocumented tuning switches.
 +
 +The differences between the first version of the patch and this version is that
 +I added explicit RTL abi attributes for when the compiler can generate the load
 +vector pair and store vector pair instructions.  By having this attribute, the
 +movoo insn has separate alternatives for when we generate the instruction and
 +when we want to split the instruction into 2 separate vector loads or stores.
 +
 +In the first version of the patch, I had previously provided built-in functions
 +that would always generate load vector pair and store vector pair instructions
 +even if these instructions are normally disabled.  I found these built-ins
 +weren't specified like the other vector pair built-ins, and I didn't include
 +documentation for the built-in functions.  If we want such built-in functions,
 +we can add them as a separate patch later.
 +
 +In addition, since both versions of the patch adds #pragma target and attribute
 +support to change the results for individual functions, we can select on a
 +function by function basis what the defaults for load/store vector pair is.
 +
 +The original text for the patch is:
 +
 +In working on some future patches that involve utilizing vector pair
 +instructions, I wanted to be able to tune my program to enable or disable using
 +the vector pair load or store operations while still keeping the other
 +operations on the vector pair.
 +
 +This patch adds two undocumented tuning options.  The -mno-load-vector-pair
 +option would tell GCC to generate two load vector instructions instead of a
 +single load vector pair.  The -mno-store-vector-pair option would tell GCC to
 +generate two store vector instructions instead of a single store vector pair.
 +
 +If either -mno-load-vector-pair is used, GCC will not generate the indexed
 +stxvpx instruction.  Similarly if -mno-store-vector-pair is used, GCC will not
 +generate the indexed lxvpx instruction.  The reason for this is to enable
 +splitting the {,p}lxvp or {,p}stxvp instructions after reload without needing a
 +scratch GPR register.
 +
 +The default for -mcpu=power10 is that both load vector pair and store vector
 +pair are enabled.
 +
 +I added code so that the user code can modify these settings using either a
 +'#pragma GCC target' directive or used __attribute__((__target__(...))) in the
 +function declaration.
 +
 +I added tests for the switches, #pragma, and attribute options.
 +
 +I have built this on both little endian power10 systems and big endian power9
 +systems doing the normal bootstrap and test.  There were no regressions in any
 +of the tests, and the new tests passed.  Can I check this patch into the master
 +branch?
 +
 +2024-01-03  Michael Meissner  <meissner@linux.ibm.com>
 +
 +gcc/
 +
 +	* config/rs6000/mma.md (movoo): Add support for -mno-load-vector-pair and
 +	-mno-store-vector-pair.
 +	* config/rs6000/rs6000-cpus.def (OTHER_POWER10_MASKS): Add support for
 +	-mload-vector-pair and -mstore-vector-pair.
 +	(POWERPC_MASKS): Likewise.
 +	* config/rs6000/rs6000.cc (rs6000_setup_reg_addr_masks): Only allow
 +	indexed mode for OOmode if we are generating both load vector pair and
 +	store vector pair instructions.
 +	(rs6000_option_override_internal): Add support for -mno-load-vector-pair
 +	and -mno-store-vector-pair.
 +	(rs6000_opt_masks): Likewise.
 +	* config/rs6000/rs6000.md (isa attribute): Add lxvp and stxvp
 +	attributes.
 +	(enabled attribute): Likewise.
 +	* config/rs6000/rs6000.opt (-mload-vector-pair): New option.
 +	(-mstore-vector-pair): Likewise.
 +
 +gcc/testsuite/
 +
 +	* gcc.target/powerpc/vector-pair-attribute.c: New test.
 +	* gcc.target/powerpc/vector-pair-pragma.c: New test.
 +	* gcc.target/powerpc/vector-pair-switch1.c: New test.
 +	* gcc.target/powerpc/vector-pair-switch2.c: New test.
 +	* gcc.target/powerpc/vector-pair-switch3.c: New test.
 +	* gcc.target/powerpc/vector-pair-switch4.c: New test.
 +
 +==================== Branch work151, baseline ====================
 +
 +Add ChangeLog.meissner and REVISION.
 +
 +2024-01-03  Michael Meissner  <meissner@linux.ibm.com>
 +
 +gcc/
 +
 +	* REVISION: New file for branch.
 +	* ChangeLog.meissner: New file.
 +
 +gcc/c-family/
 +
 +	* ChangeLog.meissner: New file.
 +
 +gcc/c/
 +
 +	* ChangeLog.meissner: New file.
 +
 +gcc/cp/
 +
 +	* ChangeLog.meissner: New file.
 +
 +gcc/fortran/
 +
 +	* ChangeLog.meissner: New file.
 +
 +gcc/testsuite/
 +
 +	* ChangeLog.meissner: New file.
 +
 +libgcc/
 +
 +	* ChangeLog.meissner: New file.
 +
+ ==================== Branch work151-dmf, baseline ====================
+ 
  2024-01-03   Michael Meissner  <meissner@linux.ibm.com>
  
  	Clone branch