Port gcc-dg tests from GCC

SingleSource/Regression/C/CMakeLists.txt

@@ -3,6 +3,7 @@ if(ARCH MATCHES "x86" OR ARCH MATCHES "riscv" OR
    ARCH MATCHES "AArch64" OR ARCH MATCHES "ARM" OR
    ARCH MATCHES "LoongArch")
   add_subdirectory(gcc-c-torture)
+  add_subdirectory(gcc-dg)
 endif()
 
 list(APPEND LDFLAGS -lm)

SingleSource/Regression/C/gcc-c-torture/CMakeLists.txt

@@ -1,64 +1,5 @@
-# The following cause errors if they are passed to clang via CFLAGS
-set(CLANG_ERRORING_CFLAGS
-  "-fno-early-inlining"
-  "-fno-ira-share-spill-slots"
-  "-ftree-loop-distribution"
-  "-fno-tree-bit-ccp"
-  "-fno-tree-coalesce-vars"
-)
-
-# This pulls out options in dg-options into `${Variable}`
-function(gcc_torture_dg_options_cflags Variable File)
-  # Some files have dg-options which we need to pick up. These should be in
-  # the first line but often aren't.
-  #
-  # We also need to be careful not to pick up target-specific dg-options.
-  set(DG_CFLAGS)
-
-  file(STRINGS ${File} FileLines)
-  foreach(FileLine ${FileLines})
-    # Looking for `dg-options "..."` or `dg-additional-options "..."` without
-    # `{ target` afterwards (ignoring spaces).
-    if(FileLine MATCHES "dg-(additional-)?options ({ )?\"([^\"]*)\"( })?(.*)")
-      # This is needed to turn the string into a list of CFLAGS
-      separate_arguments(FILE_CFLAGS UNIX_COMMAND ${CMAKE_MATCH_3})
-      # This does the negative lookahead for `{ target` anywhere in the rest of
-      # the line
-      if(NOT ${CMAKE_MATCH_5} MATCHES "{ +target")
-        list(APPEND DG_CFLAGS ${FILE_CFLAGS})
-      endif()
-    endif()
-  endforeach()
-
-  # Remove any flags that will make clang error
-  if (DG_CFLAGS)
-    list(REMOVE_ITEM DG_CFLAGS ${CLANG_ERRORING_CFLAGS})
-  endif()
-
-  # Set the parent scope variable
-  set(${Variable} ${DG_CFLAGS} PARENT_SCOPE)
-endfunction()
-
-function(gcc_torture_execute_test File)
-  cmake_parse_arguments(_TORTURE "" "PREFIX" "CFLAGS;LDFLAGS" ${ARGN})
-  # There are a few tests with duplicate filenames, and CMake wants all target
-  # names to be unique, so we add a disambiguator to the target name. The
-  # disambiguator is based upon the directory structure, swapping `/` for `-`.
-  get_filename_component(Name ${File} NAME_WE)
-  set(_target "${_TORTURE_PREFIX}-${Name}")
-
-  gcc_torture_dg_options_cflags(DG_CFLAGS ${File})
-
-  # Add any flags that were requested
-  list(APPEND CFLAGS ${DG_CFLAGS} ${_TORTURE_CFLAGS})
-  list(APPEND LDFLAGS ${_TORTURE_LDFLAGS})
-
-  llvm_test_executable_no_test(${_target} ${File})
-  llvm_test_run()
-
-  llvm_add_test_for_target(${_target})
-endfunction()
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../DgOptions.txt)
 
 file(COPY lit.local.cfg DESTINATION "${CMAKE_CURRENT_BINARY_DIR}")
 
-add_subdirectory(execute)
+add_subdirectory(execute)

SingleSource/Regression/C/gcc-c-torture/execute/CMakeLists.txt

@@ -1,8 +1,5 @@
 add_subdirectory(ieee)
 
-# GCC C Torture Suite is conventionally run without warnings
-list(APPEND CFLAGS -Wno-implicit-int -Wno-int-conversion -Wno-implicit-function-declaration -w)
-
 set(TestsToSkip)
 
 ##

SingleSource/Regression/C/gcc-dg/20000108-1.c

@@ -0,0 +1,20 @@
+/* Copyright (C) 2000  Free Software Foundation.
+
+   by Alexandre Oliva  <[email protected]>  */
+
+/* { dg-do run } */
+/* { dg-options "-O3" } */
+
+extern void abort (void);
+
+void foo () {} /* unused, but essential to trigger the bug */
+
+int main () {
+  int i;
+  /* use asms to prevent optimizations */
+  /* i = -1; */ asm ("" : "=r" (i) : "0" (-1));
+  /* i =  1; */ asm ("" : "=r" (i) : "0" (i ? 1 : 2));
+  if (i != 1)
+    abort();
+  return 0;
+}

SingleSource/Regression/C/gcc-dg/20000111-1.c

@@ -0,0 +1,17 @@
+/* Copyright (C) 2000  Free Software Foundation.
+
+   by Alexandre Oliva  <[email protected]>  */
+
+/* { dg-do compile } */
+
+__inline int
+foo (int **q) {
+  return *q && **q;
+}
+
+void
+bar () {
+  int **p;
+  if (foo (p))
+    do_something ();
+}

SingleSource/Regression/C/gcc-dg/20000623-1.c

@@ -0,0 +1,20 @@
+/* { dg-do run } */
+/* { dg-options "-O3 -fno-strict-aliasing" } */
+
+extern void exit (int);
+extern void abort (void);
+
+struct foos { int l; }; 
+int foo;
+static struct foos *getfoo(void);
+int main (void)
+{
+  struct foos *f = getfoo();
+  f->l = 1;
+  foo = 2;
+  if (f->l == 1)
+    abort();
+  exit(0);
+}
+static struct foos *getfoo(void) 
+{ return (struct foos *)&foo; }

SingleSource/Regression/C/gcc-dg/20000629-1.c

@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -g" } */
+
+void foo(register char *p)
+{
+  char c, *q, *sp;
+  while (1) {
+    *p++=0;
+    sp=p+1;
+    c=*sp;
+    *p++=0;
+  }
+}

SingleSource/Regression/C/gcc-dg/20000707-1.c

@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -Wall" } */
+/* { dg-require-effective-target label_values } */
+
+extern void foo(void *here);
+extern inline void bar(void)
+{
+  __label__ here;
+  foo(&&here);
+here:
+  ;
+}
+
+void baz(void)
+{
+  bar();
+}

SingleSource/Regression/C/gcc-dg/20000906-1.c

@@ -0,0 +1,78 @@
+/* { dg-do run } */
+
+/* Testcase distilled from glibc's nss_parse_service_list in nss/nsswitch.c
+   It can't be distilled further.  Fails with `-O2' for i[3456]86.  */
+
+/* this simulates a bounded-pointer type.  */
+struct ucharp { unsigned char *v, *l, *h; };
+
+/* this simulates bounded-pointer check prior to pointer dereference.  */
+#define AREF(var, idx) ((((((((var).v+(idx)) < (var).l) \
+			   || (((var).v+(idx)+1) > (var).h))) \
+			  && (__builtin_trap (), 0)), \
+			 (var).v)[(idx)])
+
+struct list
+{
+  struct list *next;
+};
+
+struct list *
+alloc_list (void)
+{
+  static struct list l;
+  return &l;
+}
+
+int one = 1;
+
+void
+foo (struct ucharp cp, struct ucharp lp, struct list **nextp)
+{
+  while (1)
+    {
+      struct list *list;
+      while (AREF (lp, 0) && AREF (cp, AREF (lp, 0)))
+        ++lp.v;
+      list = alloc_list ();
+      while (AREF (cp, AREF (lp, 0)))
+        ++lp.v;
+      if (AREF (lp, 0) == one)
+	do
+	  ++lp.v;
+	while (AREF (lp, 0) && AREF (cp, AREF (lp, 0)));
+      /* The above AREF (cp, ...) fails because the pseudo created to
+	 hold cp.v holds garbage, having never been set.
+	 The easiest way to see the problem is to compile wiht `-O2 -da'
+	 then look at *.09.loop.  Search for something like this:
+
+	 Hoisted regno 183 r/o from (mem/s:SI (reg:SI 16 argp) 10)
+	   Replaced reg 91, deleting init_insn (213).
+
+	 Now, look for the use of reg 91, which has no set.  */
+
+      *nextp = list;
+      nextp = &list->next;
+      if (!*lp.v)
+	break;
+    }
+}
+
+extern void exit (int);
+
+int
+main (void)
+{
+  static unsigned char cp0[] = "\0\0\0\0";
+  struct ucharp cp = { cp0, cp0, cp0 + sizeof (cp0) };
+
+  static unsigned char lp0[] = "\1\1\0\0";
+  struct ucharp lp = { lp0, lp0, lp0 + sizeof (lp0) };
+
+  struct list list;
+  struct list *nextp = &list;
+
+  foo (cp, lp, &nextp);
+
+  exit (0);
+}

SingleSource/Regression/C/gcc-dg/20000926-1.c

@@ -0,0 +1,27 @@
+/* Copyright (C) 2000  Free Software Foundation.
+   by William Cohen  <[email protected]>  */
+
+/* { dg-do compile } */
+/* { dg-options "" } */
+#include <limits.h>
+
+struct PDATA
+{
+    unsigned int  Dummy:(sizeof(int)*CHAR_BIT);
+    const char*   PName;
+};
+
+typedef struct PDATA    P_DATA;
+
+struct PLAYBOOK {
+        const char * BookName;
+        P_DATA       Play[0];
+};
+
+struct PLAYBOOK playbook  =
+{
+  "BookName",
+  {
+    { 1, "PName0" }, /* { dg-warning "(excess elements)|(near initialization)" } */
+  }
+};

SingleSource/Regression/C/gcc-dg/20001009-1.c

@@ -0,0 +1,48 @@
+/* { dg-do compile { target fpic } } */
+/* { dg-options "-O2 -fpic" } */
+/* { dg-skip-if "too many arguments in function call" { bpf-*-* } } */
+
+extern void foo (void *a, double x, double y);
+void
+bar (void *a, double b, double c, double d, double e, double f, double g, double h, double i, double j, double k[6])
+{
+  double l, m, n, o, p;
+  double q, r, s, t, u;
+  double x, y, v, w;
+  double z = 0.5 * j;
+  double aa;
+  l = b - 3 * d;
+  m = 4 * f;
+  n = f - h;
+  q = c + 3 * g - i;
+  r = 2 * (e - 2 * g + i);
+  s = g - i;
+  if (l != 0.0)
+    {
+      aa = 0.0;
+      o = (- m + aa);
+      p = (- m - aa);
+      if (o > 0.0)
+        {
+          x = ((b-h)*o + 3*(d+h)*o + 3*(f-h)*o);
+          y = ((c-i)*o + 3*(e+i)*o + 3*(g-i)*o);
+          foo (a, z, w);
+          foo (a, -z, w);
+        }
+      if (p > 0.0)
+        {
+          x = ((b+3*f-h)*p + 3*(d-2*f+h)*p + 3*p);
+          y = ((c+3*g-i)*p + 3*(e-2*g+i)*p + 3*p);
+          v = x * k[0] + y * k[2];
+          w = x * k[1] + y * k[3];
+          foo (a, z, w);
+          foo (a, - z, w);
+        }
+    }
+  if (q != 0.0)
+    {
+      aa = 0.0;
+      t = (- r + aa) / (2 * q);
+      u = (- r - aa) / (2 * q);
+    }
+}

SingleSource/Regression/C/gcc-dg/20001012-1.c

@@ -0,0 +1,19 @@
+/* { dg-do run { target fpic } } */
+/* { dg-options "-O2 -fpic" } */
+
+extern void abort (void);
+extern void exit (int);
+
+double
+foo (void)
+{
+  return (__extension__ ((union { unsigned __l __attribute__((__mode__(__SI__))); float __d; }) { __l: 0x3f800000UL }).__d);
+}
+
+int
+main ()
+{
+  if (foo() != 1.0)
+    abort ();
+  exit (0);
+}

SingleSource/Regression/C/gcc-dg/20001012-2.c

@@ -0,0 +1,38 @@
+/* { dg-do run { target fpic } } */
+/* { dg-options "-O2 -fpic" } */
+/* { dg-require-effective-target alloca } */
+
+extern void abort (void);
+extern void exit (int);
+
+void foo (char *x, const char *y, ...)
+{
+}
+
+double bar (const char *x, long y)
+{
+  return 0.0;
+}
+
+typedef __SIZE_TYPE__ size_t;
+extern size_t strlen (const char *);
+
+double baz (const char *x)
+{
+  if (x[0] != '\0')
+    {
+      char y[6 + strlen (x)];
+      foo (y, "FOO", x);
+      return bar (y, 0);
+    }
+
+  return (__extension__ ((union { unsigned __l __attribute__((__mode__(__SI__))); float __d; }) { __l: 0x3f800000UL }).__d);
+}
+
+int
+main ()
+{
+  if (baz("") != 1.0)
+    abort ();
+  exit (0);
+}