clang/test/CodeGen/2002-07-14-MiscTests.c

   1 // RUN: %clang_cc1 -w -emit-llvm %s  -o /dev/null
   2
   3 /* These are random tests that I used when working on the GCC frontend
   4    originally. */
   5
   6 // test floating point comparison!
   7 int floatcomptest(double *X, double *Y, float *x, float *y) {
   8   return *X < *Y || *x < *y;
   9 }
  10
  11 extern void *malloc(unsigned);
  12
  13 // Exposed a bug
  14 void *memset_impl(void *dstpp, int c, unsigned len) {
  15   long long int dstp = (long long int) dstpp;
  16
  17   while (dstp % 4 != 0)
  18     {
  19       ((unsigned char *) dstp)[0] = c;
  20       dstp += 1;
  21       len -= 1;
  22     }
  23   return dstpp;
  24 }
  25
  26 // TEST problem with signed/unsigned versions of the same constants being shared
  27 // incorrectly!
  28 //
  29 static char *temp;
  30 static int remaining;
  31 static char *localmalloc(int size) {
  32   char *blah;
  33
  34   if (size>remaining)
  35     {
  36       temp = (char *) malloc(32768);
  37       remaining = 32768;
  38       return temp;
  39     }
  40   return 0;
  41 }
  42
  43 typedef struct { double X; double Y; int Z; } PBVTest;
  44
  45 PBVTest testRetStruct(float X, double Y, int Z) {
  46   PBVTest T = { X, Y, Z };
  47   return T;
  48 }
  49 PBVTest testRetStruct2(void);  // external func no inlining
  50
  51
  52 double CallRetStruct(float X, double Y, int Z) {
  53   PBVTest T = testRetStruct2();
  54   return T.X+X+Y+Z;
  55 }
  56
  57