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* [gcc r13-5161] [PR42093] [arm] [thumb2] disable tree-dce for test
@ 2023-01-14  0:16 Alexandre Oliva
  0 siblings, 0 replies; only message in thread
From: Alexandre Oliva @ 2023-01-14  0:16 UTC (permalink / raw)
  To: gcc-cvs

https://gcc.gnu.org/g:31aaa6ef5a952d4f64fb04010459f28e0e793702

commit r13-5161-g31aaa6ef5a952d4f64fb04010459f28e0e793702
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Fri Jan 13 21:15:42 2023 -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.

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" } } */

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