All routines successfully went through Joey Adam's exhaustive test program, i.e. this particular problem is not triggered by the program, because the re-declared Sprite8/16/32 functions' prototypes are different in that testcase...
To fix it, download a recompiled tigcc.a from http://www.mirari.fr/sncx (yAronet's upload area) and replace the prototypes of Sprite*, in $TIGCC/include/c/sprites.h, by:
extern void Sprite8(short asm("d0"),short asm("d1"),short asm("d2"),const unsigned char* asm("a0"),void* asm("a1"),short asm("d3"))__ATTR_LIB_ASM__;
extern void Sprite16(short asm("d0"),short asm("d1"),short asm("d2"),__cpushort asm("a0"),void* asm("a1"),short asm("d3"))__ATTR_LIB_ASM__;
extern void Sprite32(short asm("d0"),short asm("d1"),short asm("d2"),__cpulong asm("a0"),void* asm("a1"),short asm("d3"))__ATTR_LIB_ASM__;
Side notes:
* __attribute__((__regparm__(n))) (which __ATTR_LIB_C__ is) was (almost) banned from ExtGraph a while ago, so as to avoid this exact same problem. To play on the safe side, ASM routines need explicit register parameters.
* besides the Sprite8/16/32 fix, the recompiled tigcc.a contains 1) a code correctness fix + size optimization for bsearch() (which has been broken since before the creation of the TIGCC CVS repository in 2004, probably since the routine was integrated in TIGCC), 2) a significant size & speed optimization on qsort(), 3) further optimization of the ClipSprite8/16/32 routines (same prototype as Sprite8/16/32) that Joey Adams contributed to TIGCC years ago and 4) support for MIN_AMS 301 and 310.
New prototypes for bsearch() and qsort():
extern void *bsearch(const void* asm("a0"),const void* asm("a1"),short asm("d0"),short asm("d1"),compare_t asm("a2")) __ATTR_LIB_ASM__;
extern void qsort(void* asm("a0"),short asm("d0"),short asm("d1"),compare_t asm("a2"))__ATTR_LIB_ASM__;