Migrate 3C regression tests from %clang_cc1 to %clang. (#596)

This requires replacing `%clang_cc1 -verify` with `%clang -Xclang
-verify` in the tests that use it.

This is one part of the RUN command cleanup that we've wanted to do for
a while in #346, and now it is blocking part of #576. This is because
the single behavior difference we know of between %clang_cc1 and %clang
(other than the need for `-Xclang`) is that %clang_cc1 turns off the
system headers, and we want two of our tests that currently use
%clang_cc1 to be able to get checked declarations from the system
headers.

As recently as dac3f97 (August 2020),
all of the tests that used %clang_cc1 used -verify. Since then, a few
tests have been added that use %clang_cc1 and not -verify. This lends
support to my theory that the only reason we used %clang_cc1 was that we
were unaware that -verify could be used with %clang via -Xclang, and
some subsequently added tests copied the use of %clang_cc1 only because
the authors didn't know any better. Thus, I believe that the risk of the
migration affecting the validity of the tests (e.g., causing them to
falsely pass) is low.

Author: mattmccutchen-cci

clang/test/3C/addrof_crash.c

@@ -1,5 +1,5 @@
 // RUN: 3c -base-dir=%S -alltypes %s -- | FileCheck %s
-// RUN: 3c -base-dir=%S -alltypes %s -- | %clang_cc1  -fno-builtin -verify -fcheckedc-extension -x c -
+// RUN: 3c -base-dir=%S -alltypes %s -- | %clang -c  -fno-builtin -Xclang -verify -fcheckedc-extension -x c -
 
 // No conversions expected for these two, they just shouldn't crash
 

clang/test/3C/allocator.c

@@ -4,7 +4,7 @@
 //
 // RUN: rm -rf %t*
 // RUN: 3c -base-dir=%S %s -- | FileCheck -match-full-lines %s
-// RUN: 3c -base-dir=%S %s -- | %clang_cc1  -fno-builtin -verify -fcheckedc-extension -x c -
+// RUN: 3c -base-dir=%S %s -- | %clang -c  -fno-builtin -Xclang -verify -fcheckedc-extension -x c -
 // RUN: 3c -base-dir=%S -output-dir=%t.checked %s --
 // RUN: 3c -base-dir=%t.checked %t.checked/allocator.c -- | diff %t.checked/allocator.c -
 // expected-no-diagnostics

clang/test/3C/basic_checks.c

@@ -5,7 +5,7 @@
 //
 // RUN: 3c -base-dir=%S -alltypes %s -- | FileCheck -match-full-lines -check-prefixes="CHECK_ALL","CHECK" %s
 // RUN: 3c -base-dir=%S %s -- | FileCheck -match-full-lines -check-prefixes="CHECK_NOALL","CHECK" %s
-// RUN: 3c -base-dir=%S %s -- | %clang_cc1  -verify -fcheckedc-extension -x c -
+// RUN: 3c -base-dir=%S %s -- | %clang -c  -Xclang -verify -fcheckedc-extension -x c -
 // expected-no-diagnostics
 //
 

clang/test/3C/basic_inter_field.c

@@ -3,7 +3,7 @@
 // Tests properties about constraint propagation of structure fields
 // across functions
 // RUN: 3c -base-dir=%S %s -- | FileCheck -match-full-lines %s
-// RUN: 3c -base-dir=%S %s -- | %clang_cc1  -verify -fcheckedc-extension -x c -
+// RUN: 3c -base-dir=%S %s -- | %clang -c  -Xclang -verify -fcheckedc-extension -x c -
 // expected-no-diagnostics
 //
 

clang/test/3C/basic_inter_field_arr.c

@@ -3,7 +3,7 @@
 // Tests properties about arr constraints propagation.
 //
 // RUN: 3c -base-dir=%S %s -- | FileCheck -match-full-lines %s
-// RUN: 3c -base-dir=%S %s -- | %clang_cc1  -verify -fcheckedc-extension -x c -
+// RUN: 3c -base-dir=%S %s -- | %clang -c  -Xclang -verify -fcheckedc-extension -x c -
 // expected-no-diagnostics
 //
 // This tests the propagation of constraints

clang/test/3C/basic_local_field.c

@@ -3,7 +3,7 @@
 // Tests properties about type re-writing and replacement of structure members
 //
 // RUN: 3c -base-dir=%S %s -- | FileCheck -match-full-lines %s
-// RUN: 3c -base-dir=%S %s -- | %clang_cc1  -verify -fcheckedc-extension -x c -
+// RUN: 3c -base-dir=%S %s -- | %clang -c  -Xclang -verify -fcheckedc-extension -x c -
 // expected-no-diagnostics
 //
 

clang/test/3C/boundary_tests.c

@@ -2,7 +2,7 @@
 //
 // RUN: rm -rf %t*
 // RUN: 3c -base-dir=%S -addcr %s -- | FileCheck -match-full-lines %s
-// RUN: 3c -base-dir=%S -addcr %s -- | %clang_cc1  -verify -fcheckedc-extension -x c -
+// RUN: 3c -base-dir=%S -addcr %s -- | %clang -c  -Xclang -verify -fcheckedc-extension -x c -
 // RUN: 3c -base-dir=%S -addcr -output-dir=%t.checked %s --
 // RUN: 3c -base-dir=%t.checked -addcr %t.checked/boundary_tests.c -- | diff %t.checked/boundary_tests.c -
 // expected-no-diagnostics

clang/test/3C/bounds_interface.c

@@ -2,7 +2,7 @@
 //
 // RUN: rm -rf %t*
 // RUN: 3c -base-dir=%S -addcr %s -- | FileCheck -match-full-lines %s
-// RUN: 3c -base-dir=%S -addcr %s -- | %clang_cc1  -verify -fcheckedc-extension -x c -
+// RUN: 3c -base-dir=%S -addcr %s -- | %clang -c  -Xclang -verify -fcheckedc-extension -x c -
 // RUN: 3c -base-dir=%S -addcr -output-dir=%t.checked %s --
 // RUN: 3c -base-dir=%t.checked -addcr %t.checked/bounds_interface.c -- | diff %t.checked/bounds_interface.c -
 // expected-no-diagnostics

clang/test/3C/cant_be_nt.c

@@ -2,8 +2,8 @@
 //
 // Checks to make sure _Nt_arrrays only contain pointers & integers
 //
-// RUN: 3c -alltypes -base-dir=%S %s -- | %clang_cc1  -fcheckedc-extension -x c -
-// RUN: 3c -base-dir=%S %s -- | %clang_cc1  -fcheckedc-extension -x c -
+// RUN: 3c -alltypes -base-dir=%S %s -- | %clang -c  -fcheckedc-extension -x c -
+// RUN: 3c -base-dir=%S %s -- | %clang -c  -fcheckedc-extension -x c -
 // RUN: 3c -base-dir=%S %s -- | FileCheck -match-full-lines -check-prefixes="CHECK_NOALL","CHECK" %s
 // RUN: 3c -alltypes -base-dir=%S %s -- | FileCheck -match-full-lines -check-prefixes="CHECK_ALL","CHECK" %s
 // expected-no-diagnostics

clang/test/3C/const_tests.c

@@ -4,7 +4,7 @@
 //
 // RUN: rm -rf %t*
 // RUN: 3c -base-dir=%S -addcr %s -- | FileCheck -match-full-lines %s
-// RUN: 3c -base-dir=%S -addcr %s -- | %clang_cc1  -verify -fcheckedc-extension -x c -
+// RUN: 3c -base-dir=%S -addcr %s -- | %clang -c  -Xclang -verify -fcheckedc-extension -x c -
 // RUN: 3c -base-dir=%S -addcr -output-dir=%t.checked %s --
 // RUN: 3c -base-dir=%t.checked -addcr %t.checked/const_tests.c -- | diff %t.checked/const_tests.c -
 // expected-no-diagnostics