[gcc(refs/users/aoliva/heads/testme)] [PR42093] [arm] [thumb2] disable tree-dce for test

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

https://gcc.gnu.org/g:91062e3e38f5b61998d30a51ea8404626b9482e6

commit 91062e3e38f5b61998d30a51ea8404626b9482e6
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Thu Dec 1 04:38:47 2022 -0300

    [PR42093] [arm] [thumb2] disable tree-dce for test
    
    CD-DCE introduces blocks to share common PHI nodes, which replaces a
    backwards branch that used to prevent the thumb2 jump table shortening
    that PR42093 tested for.  In order to keep on testing that the
    backward branch prevents the jumptable shortening, disable tree-dce.
    
    
    for  gcc/testsuite/ChangeLog
    
            PR target/42093
            * gcc.target/arm/pr42093.c: Disable tree-dce.
    
    Change-Id: I1a22abe24d08cb91ee0a93aea8d09161da8a4b24
    TN: VB12-015

Diff:
---
 gcc/testsuite/gcc.target/arm/pr42093.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.target/arm/pr42093.c b/gcc/testsuite/gcc.target/arm/pr42093.c
index 7ba2f933eef..69b1470607c 100644
--- a/gcc/testsuite/gcc.target/arm/pr42093.c
+++ b/gcc/testsuite/gcc.target/arm/pr42093.c
@@ -1,4 +1,4 @@
-/* { dg-options "-mthumb -O2 -fno-reorder-blocks" }  */
+/* { dg-options "-mthumb -O2 -fno-reorder-blocks -fno-tree-dce" }  */
 /* { dg-require-effective-target arm_thumb2_ok } */
 /* { dg-final { scan-assembler-not "tbb" } } */
 /* { dg-final { scan-assembler-not "tbh" } } */