[gcc r12-8279] testsuite: Add arm testcase for PR105374

[gcc r12-8279] testsuite: Add arm testcase for PR105374

[Christophe Lyon]

https://gcc.gnu.org/g:6c211e70eb9d89db2be630c0d5555d21e4aee144

commit r12-8279-g6c211e70eb9d89db2be630c0d5555d21e4aee144
Author: Christophe Lyon <christophe.lyon@arm.com>
Date:   Tue Apr 26 15:57:02 2022 +0100

    testsuite: Add arm testcase for PR105374
    
    As discussed in the PR, here is the testcase with the appropriate dg-*
    directives.
    
    Tested on arm-none-eabi with
    1 -mcpu=cortex-a7/-mfloat-abi=soft/-march=armv7ve+simd
    2 -mcpu=cortex-a7/-mfloat-abi=hard/-march=armv7ve+simd
    3 -mthumb/-mcpu=cortex-a7/-mfloat-abi=hard/-march=armv7ve+simd
    4 -mthumb/-mfloat-abi=soft/-march=armv6s-m
    5 -mthumb/-mfloat-abi=soft/-march=armv7-m
    6 -mthumb/-mfloat-abi=hard/-march=armv7e-m+fp
    7 -mthumb/-mfloat-abi=hard/-march=armv7e-m+fp.dp
    8 -mthumb/-mfloat-abi=hard/-march=armv8-m.main+fp+dsp
    9 -mthumb/-mfloat-abi=hard/-march=armv8.1-m.main+mve.fp+fp.dp
    10 -mthumb/-mfloat-abi=hard/-march=armv8.1-m.main+mve
    
    The test is UNSUPPORTED with the first three ones (because of
    -mcpu=cortex-a7), ignored with armv6s-m, and PASSes with all the other
    ones, while it used crash without Jakub's fix (r12-8263), ie. FAIL
    with options 5,6,7,8,10. The test passed without Jakub's fix with
    option 9 because the problem happens only with an integer-only MVE.
    
    2022-04-26  Christophe Lyon  <christophe.lyon@arm.com>
    
            gcc/testsuite/
    
            PR tree-optimization/105374
            * gcc.target/arm/simd/pr105374.C: New.

Diff:
---
 gcc/testsuite/gcc.target/arm/simd/pr105374.C | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gcc/testsuite/gcc.target/arm/simd/pr105374.C b/gcc/testsuite/gcc.target/arm/simd/pr105374.C
new file mode 100644
index 00000000000..2b9096f1f52
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/simd/pr105374.C
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-O3" } */
+/* { dg-require-effective-target arm_v8_1m_mve_ok } */
+/* { dg-add-options arm_v8_1m_mve } */
+
+typedef float v4f __attribute__((vector_size(4 * sizeof(float))));
+v4f f_x, f_y;
+long f() { return (f_x < f_y | f_x <= f_y)[2]; }