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d751c64a67
information is in an unreachable block, then it's possible that the high/low pc
values won't be set for the dwarf information. E.g., this function:
void abort(void) __attribute__((__noreturn__));
void dead_beef(void) __attribute__ ((noreturn));
int *b;
void dead_beef(void) {
*b=0xdeadbeef;
abort();
}
has a call to "@llvm.dbg.region.end" only in the unreachable block:
define void @dead_beef() noreturn nounwind {
entry:
call void @llvm.dbg.func.start(...)
call void @llvm.dbg.stoppoint(...)
...
call void @abort( ) noreturn nounwind
unreachable
return: ; No predecessors!
call void @llvm.dbg.stoppoint(...)
call void @llvm.dbg.region.end(...)
ret void
}
The dwarf information emitted is something like:
0x00000084: TAG_subprogram [5]
AT_name( "dead_beef" )
AT_external( 0x01 )
AT_prototyped( 0x01 )
AT_decl_file( 0x01 )
AT_decl_line( 0x08 )
Note that this is *not* the best fix for this problem, but a band-aid for an
gaping wound. This code needs to be changed when we revamp our debugging
information.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56628 91177308-0d34-0410-b5e6-96231b3b80d8
|
||
|---|---|---|
| .. | ||
| CellSDKIntrinsics.td | ||
| Makefile | ||
| README.txt | ||
| SPU.h | ||
| SPU.td | ||
| SPUAsmPrinter.cpp | ||
| SPUCallingConv.td | ||
| SPUFrameInfo.cpp | ||
| SPUFrameInfo.h | ||
| SPUHazardRecognizers.cpp | ||
| SPUHazardRecognizers.h | ||
| SPUInstrBuilder.h | ||
| SPUInstrFormats.td | ||
| SPUInstrInfo.cpp | ||
| SPUInstrInfo.h | ||
| SPUInstrInfo.td | ||
| SPUISelDAGToDAG.cpp | ||
| SPUISelLowering.cpp | ||
| SPUISelLowering.h | ||
| SPUMachineFunction.h | ||
| SPUNodes.td | ||
| SPUOperands.td | ||
| SPURegisterInfo.cpp | ||
| SPURegisterInfo.h | ||
| SPURegisterInfo.td | ||
| SPURegisterNames.h | ||
| SPUSchedule.td | ||
| SPUSubtarget.cpp | ||
| SPUSubtarget.h | ||
| SPUTargetAsmInfo.cpp | ||
| SPUTargetAsmInfo.h | ||
| SPUTargetMachine.cpp | ||
| SPUTargetMachine.h | ||
//===- README.txt - Notes for improving CellSPU-specific code gen ---------===//
This code was contributed by a team from the Computer Systems Research
Department in The Aerospace Corporation:
- Scott Michel (head bottle washer and much of the non-floating point
instructions)
- Mark Thomas (floating point instructions)
- Michael AuYeung (intrinsics)
- Chandler Carruth (LLVM expertise)
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT, OR
OTHERWISE. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE FOR DAMAGES
OF ANY KIND OR NATURE WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE ARISING
OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE INCLUDING, WITHOUT
LIMITATION, DAMAGES RESULTING FROM LOST OR CONTAMINATED DATA, LOST PROFITS OR
REVENUE, COMPUTER MALFUNCTION, OR FOR ANY SPECIAL, INCIDENTAL, CONSEQUENTIAL,
OR PUNITIVE DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR
SUCH DAMAGES ARE FORESEEABLE.
---------------------------------------------------------------------------
--WARNING--:
--WARNING--: The CellSPU work is work-in-progress and "alpha" quality code.
--WARNING--:
If you are brave enough to try this code or help to hack on it, be sure
to add 'spu' to configure's --enable-targets option, e.g.:
./configure <your_configure_flags_here> \
--enable-targets=x86,x86_64,powerpc,spu
---------------------------------------------------------------------------
TODO:
* Finish branch instructions, branch prediction
These instructions were started, but only insofar as to get llvm-gcc-4.2's
crtbegin.ll working (which doesn't.)
* Double floating point support
This was started. "What's missing?" to be filled in.
* Intrinsics
Lots of progress. "What's missing/incomplete?" to be filled in.
===-------------------------------------------------------------------------===