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67582e6eef
From a Coverity defect report.
src/mesa/drivers/dri/i915/i915_fragprog.c
301 /*
302 * TODO: consider moving this into core
303 */
304 static bool calc_live_regs( struct i915_fragment_program *p )
305 {
306 const struct gl_fragment_program *program = &p->FragProg;
307 GLuint regsUsed = 0xffff0000;
-> 308 uint8_t live_components[16] = { 0, };
309 GLint i;
310
311 for (i = program->Base.NumInstructions - 1; i >= 0; i--) {
312 struct prog_instruction *inst =
&program->Base.Instructions[i];
313 int opArgs = _mesa_num_inst_src_regs(inst->Opcode);
314 int a;
315
316 /* Register is written to: unmark as live for this and
preceeding ops */
317 if (inst->DstReg.File == PROGRAM_TEMPORARY) {
-> 318 if (inst->DstReg.Index > 16)
319 return false;
320
-> 321 live_components[inst->DstReg.Index] &= ~inst->DstReg.WriteMask;
322 if (live_components[inst->DstReg.Index] == 0)
323 regsUsed &= ~(1 << inst->DstReg.Index);
324 }
325
326 for (a = 0; a < opArgs; a++) {
327 /* Register is read from: mark as live for this and preceeding ops */
328 if (inst->SrcReg[a].File == PROGRAM_TEMPORARY) {
329 unsigned c;
330
331 if (inst->SrcReg[a].Index > 16)
332 return false;
333
334 regsUsed |= 1 << inst->SrcReg[a].Index;
335
336 for (c = 0; c < 4; c++) {
337 const unsigned field = GET_SWZ(inst->SrcReg[a].Swizzle, c);
338
339 if (field <= SWIZZLE_W)
340 live_components[inst->SrcReg[a].Index] |= (1U << field);
341 }
342 }
343 }
344
345 p->usedRegs[i] = regsUsed;
346 }
Reported-by: Vinson Lee <vlee@vmware.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=40022
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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| configs | ||
| docs | ||
| doxygen | ||
| include | ||
| scons | ||
| src | ||
| .emacs-dirvars | ||
| .gitattributes | ||
| .gitignore | ||
| acinclude.m4 | ||
| Android.common.mk | ||
| Android.mk | ||
| autogen.sh | ||
| common.py | ||
| configure.ac | ||
| Makefile | ||
| SConstruct | ||
File: docs/README.WIN32 Last updated: 23 April 2011 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons osmesa mesagdi to build classic mesa Windows GDI drivers; or scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.