I'm having some trouble using bugpoint with newer version of gcc (bugpoint
debug output below).
I looked into the "conflicting type for malloc" problem and it
doesn't seem
easy to solve due to the unknown size of size_t (see LowerAllocations.cpp).
The "void main()" problem is probably a result of this test being
converted
from Fortran. I'll have to dig into that some more.
The missing ";" looks like a serious problem. The CBE is just
generating
bogus code:
llvm_cbe_file_20_test_2e_f_2c__20_line_20_151_2c__20_bb66:
llvm_cbe_r1380 = *(&llvm_cbe_SUM);
*(&llvm_cbe__24_SUM_S94) = llvm_cbe_r1380;
llvm_cbe_r1381 = *(&llvm_cbe__24_SUM_S94);
return llvm_cbe_r1381
<EOF>
That is, there's no semicolon and no closing brace.
Is anyone else seeing these kinds of problems?
-Dave
Bugpoint debug output:
Generating reference output from raw program: <cbe>
About to run: /ptmp/dag/universal_build/llvm-project/Debug/bin/llc -o
bugpoint-test-program.bc.cbe.c -march=c -f bugpoint-test-program.bc
<cbe>
About to run: /ptmp/dag/universal_build/llvm-project/Debug/bin/llc -o
bugpoint-test-program.bc.cbe.c -march=c -f bugpoint-test-program.bc
<cray>
About to run: /usr/bin/gcc bugpoint-test-program.bc.cbe.c -c -o
bugpoint-test-program.bc.cbe.c.cray.o
Error running tool:
/usr/bin/gcc bugpoint-test-program.bc.cbe.c -c -o
bugpoint-test-program.bc.cbe.c.cray.o
bugpoint-test-program.bc.cbe.c:235: warning: conflicting types for built-in
function 'malloc'
bugpoint-test-program.bc.cbe.c: In function 'main':
bugpoint-test-program.bc.cbe.c:407: warning: return type of 'main' is
not
'int'
bugpoint-test-program.bc.cbe.c:7267:24: warning: no newline at end of file
bugpoint-test-program.bc.cbe.c: In function 'vlswork_':
bugpoint-test-program.bc.cbe.c:7267: error: expected ';' at end of input
bugpoint-test-program.bc.cbe.c:7267: error: expected declaration or statement
at end of input
On Wednesday 16 July 2008 10:12, David Greene wrote:> I'm having some trouble using bugpoint with newer version of gcc (bugpoint > debug output below).I was using gcc 4.1.2. When I try 3.2.3 I get: bugpoint-test-program.bc.cbe.c:237: warning: conflicting types for built-in function `memcpy' bugpoint-test-program.bc.cbe.c: In function `main': bugpoint-test-program.bc.cbe.c:581: no vector mode with the size and type specified could be found and a bunch more vector errors. So I'm in a bit of a pickle. Does anyone know which versions of gcc understand the cbe output? -Dave
On Wednesday 16 July 2008 10:31, David Greene wrote:> On Wednesday 16 July 2008 10:12, David Greene wrote: > > I'm having some trouble using bugpoint with newer version of gcc > > (bugpoint debug output below). > > I was using gcc 4.1.2. When I try 3.2.3 I get: > > bugpoint-test-program.bc.cbe.c:237: warning: conflicting types for built-in > function `memcpy' > bugpoint-test-program.bc.cbe.c: In function `main': > bugpoint-test-program.bc.cbe.c:581: no vector mode with the size and type > specified could be found > > and a bunch more vector errors. > > So I'm in a bit of a pickle. Does anyone know which versions of gcc > understand the cbe output?After hacking around in the CBE output I managed to compile it with gcc, only to discover that gcc 4.1.2 has the SAME bug LLVM does with respect to alignment. It is using a movapd where the address is NOT aligned. So I can't generate correct code using CBE/gcc. Our C compiler doesn't recognize gcc's vector intrinsics so I can't use CBE with that. I discovered that I can reproduce the problem with: /ptmp/dag/universal_build/llvm-project/Debug/bin/opt -std-compile-opts -f -o bugpoint-test-program.opt.bc bugpoint-test-program.bc /ptmp/dag/universal_build/llvm-project/Debug/bin/llc -f -o bugpoint-test-program.opt.bc.s bugpoint-test-program.opt.bc ftn bugpoint-test-program.opt.bc.s (our Fortran compiler) ./a.out If I remove -std-compile-opts, it passes. I don't see a way to run opt directly with bugpoint. It seems to want to go through the CBE, which has the problems I mentioned before (generating syntactically-incorrect C). If I pass -run-llc to bugpoint it seems to ignore optimization flags I give it. Only running bugpoint with default options (which seems to be the same as -run-cbe) seems to accept optimization flags. What's the proper incantation to get bugpoint to run things through opt but use llc to generate asm? As noted, CBE has issues generating correct code so using it isn't an option right now. -Dave