Add test for the msve-vector-bits option

This is the clang-tests, copied and converted to flang, minus the
attribute parts that aren't available in fortran.

Author: Leporacanthicus

flang/test/Driver/aarch64-sve-vector-bits.f90

@@ -0,0 +1,55 @@
+! -----------------------------------------------------------------------------
+! Tests for the -msve-vector-bits flag (taken from the clang test)
+! -----------------------------------------------------------------------------
+
+! RUN: %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=128 2>&1 | FileCheck --check-prefix=CHECK-128 %s
+! RUN: %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=256 2>&1 | FileCheck --check-prefix=CHECK-256 %s
+! RUN: %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=512 2>&1 | FileCheck --check-prefix=CHECK-512 %s
+! RUN: %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=1024 2>&1 | FileCheck --check-prefix=CHECK-1024 %s
+! RUN: %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=2048 2>&1 | FileCheck --check-prefix=CHECK-2048 %s
+! RUN: %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=128+ 2>&1 | FileCheck --check-prefix=CHECK-128P %s
+! RUN: %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=256+ 2>&1 | FileCheck --check-prefix=CHECK-256P %s
+! RUN: %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=512+ 2>&1 | FileCheck --check-prefix=CHECK-512P %s
+! RUN: %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=1024+ 2>&1 | FileCheck --check-prefix=CHECK-1024P %s
+! RUN: %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=2048+ 2>&1 | FileCheck --check-prefix=CHECK-2048P %s
+! RUN: %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=scalable 2>&1 | FileCheck --check-prefix=CHECK-SCALABLE %s
+
+! CHECK-128: "-mvscale-max=1" "-mvscale-min=1"
+! CHECK-256: "-mvscale-max=2" "-mvscale-min=2"
+! CHECK-512: "-mvscale-max=4" "-mvscale-min=4"
+! CHECK-1024: "-mvscale-max=8" "-mvscale-min=8"
+! CHECK-2048: "-mvscale-max=16" "-mvscale-min=16"
+
+! CHECK-128P: "-mvscale-min=1"
+! CHECK-128P-NOT: "-mvscale-max"
+! CHECK-256P: "-mvscale-min=2"
+! CHECK-256P-NOT: "-mvscale-max"
+! CHECK-512P: "-mvscale-min=4"
+! CHECK-512P-NOT: "-mvscale-max"
+! CHECK-1024P: "-mvscale-min=8"
+! CHECK-1024P-NOT: "-mvscale-max"
+! CHECK-2048P: "-mvscale-min=16"
+! CHECK-2048P-NOT: "-mvscale-max"
+! CHECK-SCALABLE-NOT: "-mvscale-min=
+! CHECK-SCALABLE-NOT: "-mvscale-max=
+
+! Error out if an unsupported value is passed to -msve-vector-bits.
+! -----------------------------------------------------------------------------
+! RUN: not %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=64 2>&1 | FileCheck --check-prefix=CHECK-BAD-VALUE-ERROR %s
+! RUN: not %flang -c %s -### --target=aarch64-none-linux-gnu -march=armv8-a+sve \
+! RUN:  -msve-vector-bits=A 2>&1 | FileCheck --check-prefix=CHECK-BAD-VALUE-ERROR %s
+
+! CHECK-BAD-VALUE-ERROR: error: unsupported argument '{{.*}}' to option '-msve-vector-bits='
+