[gcc(refs/users/meissner/heads/work116)] Update ChangeLog.*

[gcc(refs/users/meissner/heads/work116)] Update ChangeLog.*

[Michael Meissner]

https://gcc.gnu.org/g:557eb70f26250a523022edf3b043190875b1cfa7

commit 557eb70f26250a523022edf3b043190875b1cfa7
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Fri Mar 24 17:31:09 2023 -0400

    Update ChangeLog.*

Diff:
---
 gcc/ChangeLog.meissner | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/gcc/ChangeLog.meissner b/gcc/ChangeLog.meissner
index 489c3307113..b0bbf1a43f1 100644
--- a/gcc/ChangeLog.meissner
+++ b/gcc/ChangeLog.meissner
@@ -1,3 +1,47 @@
+==================== Branch work116, patch #1 ====================
+
+Make load/cmp fusion know about prefixed loads.
+
+The issue with the bug is the power10 load GPR + cmpi -1/0/1 fusion
+optimization generates illegal assembler code.
+
+Ultimately the code was dying because the fusion load + compare -1/0/1 patterns
+did not handle the possibility that the load might be prefixed.
+
+The main cause is the constraints for the individual loads in the fusion did not
+match the machine.  In particular, LWA is a ds format instruction when it is
+unprefixed.  The code did not also set the prefixed attribute correctly.
+
+This patch rewrites the genfusion.pl script so that it will have more accurate
+constraints for the LWA and LD instructions (which are DS instructions).  The
+updated genfusion.pl was then run to update fusion.md.  Finally, the code for
+the "prefixed" attribute is modified so that it considers load + compare
+immediate patterns to be like the normal load insns in checking whether
+operand[1] is a prefixed instruction.
+
+I posted a version of patch on March 21st.  This patch makes some code changes
+suggested in the genfusion.pl code.
+
+2023-03-21   Michael Meissner  <meissner@linux.ibm.com>
+
+gcc/
+
+	PR target/105325
+	* gcc/config/rs6000/genfusion.pl (gen_ld_cmpi_p10): Improve generation
+	of the ld and lwa instructions which use the DS encoding instead of D.
+	Use the YZ constraint for these loads.	Handle prefixed loads better.
+	Set the sign_extend attribute as appropriate.
+	* gcc/config/rs6000/fusion.md: Regenerate.
+	* gcc/config/rs6000/rs6000.md (prefixed attribute): Add fused_load_cmpi
+	instructions to the list of instructions that might have a prefixed load
+	instruction.
+
+gcc/testsuite/
+
+	PR target/105325
+	* g++.target/powerpc/pr105325.C: New test.
+	* gcc.target/powerpc/fusion-p10-ldcmpi.c: Adjust insn counts.
+
 ==================== Branch work116, baseline ====================
 
 2023-03-24   Michael Meissner  <meissner@linux.ibm.com>

[gcc(refs/users/meissner/heads/work116)] Update ChangeLog.*

[Michael Meissner]

https://gcc.gnu.org/g:e1bb8baafe64038aacf530c240092ed5ede0ec3a

commit e1bb8baafe64038aacf530c240092ed5ede0ec3a
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Tue Mar 28 16:12:30 2023 -0400

    Update ChangeLog.*

Diff:
---
 gcc/ChangeLog.meissner | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/ChangeLog.meissner b/gcc/ChangeLog.meissner
index 62556895b5c..d8981e78cf5 100644
--- a/gcc/ChangeLog.meissner
+++ b/gcc/ChangeLog.meissner
@@ -1,4 +1,4 @@
-==================== Branch work116, patch #1 ====================
+==================== Branch work116, patch #2 ====================
 
 Make load/cmp fusion know about prefixed loads.

[gcc(refs/users/meissner/heads/work116)] Update ChangeLog.*

[Michael Meissner]

https://gcc.gnu.org/g:4de71cc9bd14b6683786e004a6fa801089a79ed4

commit 4de71cc9bd14b6683786e004a6fa801089a79ed4
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Mon Mar 27 16:04:32 2023 -0400

    Update ChangeLog.*

Diff:
---
 gcc/ChangeLog.meissner | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/gcc/ChangeLog.meissner b/gcc/ChangeLog.meissner
index b0bbf1a43f1..62556895b5c 100644
--- a/gcc/ChangeLog.meissner
+++ b/gcc/ChangeLog.meissner
@@ -19,10 +19,11 @@ the "prefixed" attribute is modified so that it considers load + compare
 immediate patterns to be like the normal load insns in checking whether
 operand[1] is a prefixed instruction.
 
-I posted a version of patch on March 21st.  This patch makes some code changes
-suggested in the genfusion.pl code.
+I posted a version of patch on March 21st and a second version on March 24th.
+This patch makes some code changes suggested in the genfusion.pl code.  The
+fusion.md that is produced by genfusion.pl is the same in all 3 versions.
 
-2023-03-21   Michael Meissner  <meissner@linux.ibm.com>
+2023-03-27   Michael Meissner  <meissner@linux.ibm.com>
 
 gcc/
 
@@ -42,6 +43,8 @@ gcc/testsuite/
 	* g++.target/powerpc/pr105325.C: New test.
 	* gcc.target/powerpc/fusion-p10-ldcmpi.c: Adjust insn counts.
 
+==================== Branch work116, patch #1 was reverted ====================
+
 ==================== Branch work116, baseline ====================
 
 2023-03-24   Michael Meissner  <meissner@linux.ibm.com>