[LLVMbugs] [Bug 10640] New: Dragonegg miscompiles dlls/d3dx9_36/tests/math.c from Wine

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=10640

           Summary: Dragonegg miscompiles dlls/d3dx9_36/tests/math.c from
                    Wine
           Product: dragonegg
           Version: 2.9
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: miscompilation
          Severity: normal
          Priority: P
         Component: New Bugs
        AssignedTo: baldrick at free.fr
        ReportedBy: austinenglish at gmail.com
                CC: llvmbugs at cs.uiuc.edu
        Depends on: 10639


Dragonegg can compile wine successfully, aside from
http://bugs.winehq.org/show_bug.cgi?id=28050. Running its test suite, however,
shows a few problems.

To reproduce, compile wine with:
$ CC=llvm-gcc ./configure
$ make

then run the test:
$ cd dlls/d3dx9_36/tests
$ make math.ok

this will fail:
llvm-gcc -c -I. -I. -I../../../include -I../../../include 
-DWINE_STRICT_PROTOTYPES -DWINE_NO_NAMELESS_EXTENSION  -D_REENTRANT -fPIC -Wall
-pipe -fno-strict-aliasing -Wdeclaration-after-statement -Wempty-body
-Wstrict-prototypes -Wtype-limits -Wwrite-strings -Wpointer-arith -Wlogical-op 
-g -O2  -o math.o math.c
../../../tools/winegcc/winegcc  -B../../../tools/winebuild --sysroot=../../..
-fasynchronous-unwind-tables  asm.o core.o effect.o line.o math.o mesh.o
shader.o surface.o texture.o      rsrc.res  testlist.o -o d3dx9_36_test.exe.so
../../../libs/port/libwine_port.a -ld3dx9 -ld3d9 -luser32 -lgdi32   
../../../tools/runtest -q -P wine -M d3dx9_36.dll -T ../../.. -p
d3dx9_36_test.exe.so math.c && touch math.ok
fixme:d3dx:D3DXQuaternionLn The quaternion (0.200000, 0.100000, 0.300000,
0.900000) has a norm <1. This should not happen. Windows returns a result
anyway. This case is not implemented yet.
math.c:2278: Test failed: Got ffff, expected 7fff or 7fff for index 18.
math.c:2278: Test failed: Got 7fff, expected ffff or ffff for index 19.
make: *** [math.ok] Error 2

compiling math.c with gcc, or using -O0 instead of 01/02 works around the
issue. I'll attach preprocessed source files from llvm-gcc and gcc (versions
below), as well as a reduced down version of math.c that more clearly shows the
problem. If more info is needed, please don't hesitate to ask.

austin at debian:~/wine-llvmgcc/dlls/crypt32/tests$ llvm-gcc  --version
gcc-4.5 (Debian 4.5.3-3) 4.5.3
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

austin at debian:~/wine-llvmgcc/dlls/crypt32/tests$ gcc --version
gcc (Debian 4.4.6-7) 4.4.6
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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