[gcc(refs/users/aoliva/heads/testme)] [rs6000] Correct match pattern in pr56605.c

[Alexandre Oliva <aoliva@gcc.gnu.org>]

https://gcc.gnu.org/g:6a8c54e7d90e0e38f371f6b4f8ddf3200a92d12d

commit 6a8c54e7d90e0e38f371f6b4f8ddf3200a92d12d
Author: Haochen Gui <guihaoc@linux.ibm.com>
Date:   Fri Mar 24 02:57:14 2023 -0300

    [rs6000] Correct match pattern in pr56605.c
    
    This patch corrects the match pattern in pr56605.c. The former pattern
    is wrong and test case fails with GCC11. It should match following
    insn on each subtarget after mode promotion is disabled. The patch
    need to be backported to GCC11.
    
    //gimple
    _17 = (unsigned int) _20;
     prolog_loop_niters.4_23 = _17 & 3;
    
    //rtl
    (insn 19 18 20 2 (parallel [
                (set (reg:CC 208)
                    (compare:CC (and:SI (subreg:SI (reg:DI 207) 0)
                            (const_int 3 [0x3]))
                        (const_int 0 [0])))
                (set (reg:SI 129 [ prolog_loop_niters.5 ])
                    (and:SI (subreg:SI (reg:DI 207) 0)
                        (const_int 3 [0x3])))
            ]) 197 {*andsi3_imm_mask_dot2}
    
    
    for  gcc/testsuite/ChangeLog
    
            PR target/102146
            * gcc.target/powerpc/pr56605.c: Correct match pattern in
            combine pass.

Diff:
---
 gcc/testsuite/gcc.target/powerpc/pr56605.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/gcc/testsuite/gcc.target/powerpc/pr56605.c b/gcc/testsuite/gcc.target/powerpc/pr56605.c
index 7695f87db6f..651a88e3cc7 100644
--- a/gcc/testsuite/gcc.target/powerpc/pr56605.c
+++ b/gcc/testsuite/gcc.target/powerpc/pr56605.c
@@ -11,5 +11,4 @@ void foo (short* __restrict sb, int* __restrict ia)
     ia[i] = (int) sb[i];
 }
 
-/* { dg-final { scan-rtl-dump-times {\(compare:CC \((?:and|zero_extend):(?:[SD]I) \((?:sub)?reg:[SD]I} 1 "combine" } } */
-
+/* { dg-final { scan-rtl-dump-times {\(compare:CC \(and:SI \(subreg:SI \(reg:DI} 1 "combine" } } */