[gcc r12-4244] Tweak new test cases for -march=cascadelake strangeness.

[gcc r12-4244] Tweak new test cases for -march=cascadelake strangeness.

[Roger Sayle]

https://gcc.gnu.org/g:90285ce98f3c69f275c05397f7c74d22462edc05

commit r12-4244-g90285ce98f3c69f275c05397f7c74d22462edc05
Author: Roger Sayle <roger@nextmovesoftware.com>
Date:   Fri Oct 8 09:33:38 2021 +0100

    Tweak new test cases for -march=cascadelake strangeness.
    
    As reported by Sunil's tester, -march=cascadelake triggers some SUBREG
    non-determinacy in the generated assembler for my new tests.  Fixed
    by updating the regular expressions to match either the zero or sign
    extended forms.  I'm testing a backend patch that may help with the
    underlying cause of these differences.
    
    2021-10-08  Roger Sayle  <roger@nextmovesoftware.com>
    
    gcc/testsuite/ChangeLog
            * gcc.target/i386/sse2-mmx-paddsb-2.c: Test for -128 or 128.
            * gcc.target/i386/sse2-mmx-paddusb-2.c: Test for -1 or 255.
            * gcc.target/i386/sse2-mmx-psubsb-2.c: Test for -128 or 128.

Diff:
---
 gcc/testsuite/gcc.target/i386/sse2-mmx-paddsb-2.c  | 2 +-
 gcc/testsuite/gcc.target/i386/sse2-mmx-paddusb-2.c | 2 +-
 gcc/testsuite/gcc.target/i386/sse2-mmx-psubsb-2.c  | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/testsuite/gcc.target/i386/sse2-mmx-paddsb-2.c b/gcc/testsuite/gcc.target/i386/sse2-mmx-paddsb-2.c
index c677884ac5e..ad4726bc71a 100644
--- a/gcc/testsuite/gcc.target/i386/sse2-mmx-paddsb-2.c
+++ b/gcc/testsuite/gcc.target/i386/sse2-mmx-paddsb-2.c
@@ -29,5 +29,5 @@ char baz()
 
 /* { dg-final { scan-assembler-times "movl\[ \\t\]+\\\$3," 1 } } */
 /* { dg-final { scan-assembler-times "movl\[ \\t\]+\\\$127," 1 } } */
-/* { dg-final { scan-assembler-times "movl\[ \\t\]+\\\$-128," 1 } } */
+/* { dg-final { scan-assembler-times "movl\[ \\t\]+\\\$-?128," 1 } } */
 /* { dg-final { scan-assembler-not "paddsb\[ \\t\]+%xmm\[0-9\]+" } } */
diff --git a/gcc/testsuite/gcc.target/i386/sse2-mmx-paddusb-2.c b/gcc/testsuite/gcc.target/i386/sse2-mmx-paddusb-2.c
index b20891cf693..1d3bc8b5109 100644
--- a/gcc/testsuite/gcc.target/i386/sse2-mmx-paddusb-2.c
+++ b/gcc/testsuite/gcc.target/i386/sse2-mmx-paddusb-2.c
@@ -20,6 +20,6 @@ char bar()
 }
 
 /* { dg-final { scan-assembler-times "movl\[ \\t\]+\\\$3," 1 } } */
-/* { dg-final { scan-assembler-times "movl\[ \\t\]+\\\$-1," 1 } } */
+/* { dg-final { scan-assembler-times "movl\[ \\t\]+\\\$(?:255|-1)," 1 } } */
 /* { dg-final { scan-assembler-not "paddusb\[ \\t\]+%xmm\[0-9\]+" } } */
 
diff --git a/gcc/testsuite/gcc.target/i386/sse2-mmx-psubsb-2.c b/gcc/testsuite/gcc.target/i386/sse2-mmx-psubsb-2.c
index 4fc292079d1..68b57f2c971 100644
--- a/gcc/testsuite/gcc.target/i386/sse2-mmx-psubsb-2.c
+++ b/gcc/testsuite/gcc.target/i386/sse2-mmx-psubsb-2.c
@@ -28,6 +28,6 @@ char baz()
 }
 
 /* { dg-final { scan-assembler-times "movl\[ \\t\]+\\\$3," 1 } } */
-/* { dg-final { scan-assembler-times "movl\[ \\t\]+\\\$-128," 1 } } */
+/* { dg-final { scan-assembler-times "movl\[ \\t\]+\\\$-?128," 1 } } */
 /* { dg-final { scan-assembler-times "movl\[ \\t\]+\\\$127," 1 } } */
 /* { dg-final { scan-assembler-not "paddsb\[ \\t\]+%xmm\[0-9\]+" } } */