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15 Commits

Author SHA1 Message Date
Chris Lattner 2a720d933a fix visitShift to properly zero extend the shift amount if the provided operand 
is narrower than the shift register.  Doing an anyext provides undefined bits in
the top part of the register.

llvm-svn: 125457
 2011-02-13 09:02:52 +00:00
Wesley Peck 0c558b2080 Lower the MBlaze target specific calling conventions for "interrupt_handler" 
and "save_volatiles" correctly. This completes the custom calling convention
functionality changes for the MBlaze backend that were started in 121888.

llvm-svn: 121891
 2010-12-15 20:27:28 +00:00
Wesley Peck b4f896ce90 Missed some ADDI <-> ADDIK conversions in 121649. 
llvm-svn: 121652
 2010-12-12 22:53:14 +00:00
Devang Patel c24048a718 If dbg_declare() or dbg_value() is not lowered by isel then emit DEBUG message instead of creating DBG_VALUE for undefined value in reg0. 
llvm-svn: 121059
 2010-12-06 22:39:26 +00:00
Wesley Peck 8da34b6c35 Fixed reversed operands for IDIV and CMP instructions in MBlaze backend. 
Use BRAD instead of BRD for indirect branches in MBlaze backend.

patch contributed by Jack Whitham!

llvm-svn: 121044
 2010-12-06 22:06:49 +00:00
Wesley Peck 6ce9b60811 Fix a 16-bit immediate value detection bug in the MBlaze delay slot filler. 
Address more hazards in the MBlaze delay slot filler.

patch contributed by Jack Whitham!

llvm-svn: 121037
 2010-12-06 21:11:01 +00:00
Wesley Peck f1d3800e65 Implement branch analysis in the MBlaze backend. 
llvm-svn: 119951
 2010-11-21 21:53:36 +00:00
Wesley Peck c16f77fb27 Recommit 116986 with capitalization typo fixed. 
llvm-svn: 116993
 2010-10-21 03:57:26 +00:00
Wesley Peck 078db00f1d Reverting the commit 116986. It was breaking the build on llvm-x86_64-linux though it 
compiles on OS X. I'll ensure that it builds on a linux machine before committing
again.

llvm-svn: 116991
 2010-10-21 03:34:22 +00:00
Wesley Peck f608ac4db9 Major update of the MicroBlaze backend. The new features are: 
1. A delay slot filler that searches for valid instructions
       to fill the delay slot with. Previously NOPs would always
       be inserted into delay slots.
    2. Support for MC based instruction printer added.
    3. Support for MC based machine code generation and ELF
       file generation. ELF file generation does not yet
       completely work as much of the ELF support infrastructure
       is still x86/x86-64 specific.
    4. General clean up of the MBlaze backend code. Much of the
       tablegen code has been cleanup and simplified.

Bug Fixes:
    1. Removed duplicate periods from subtarget feature descriptions.
    2. Many of the instructions had bad machine code information
       in the tablegen files. Much of this has been fixed.

llvm-svn: 116986
 2010-10-21 03:09:55 +00:00
Dale Johannesen f118f9788b Split big test into multiple directories to cater to 
those who don't build all targets.

llvm-svn: 100688
 2010-04-07 20:43:35 +00:00
Wesley Peck 1fb4edc05d Re-committing the failed r97807 commit with changes to eliminate warnings. 
llvm-svn: 97891
 2010-03-06 23:23:12 +00:00
Chris Lattner 4279a078a5 revert r97807, it introduced build warnings. 
llvm-svn: 97869
 2010-03-06 04:32:46 +00:00
Wesley Peck 34004170c5 Reworking the stack layout that the MicroBlaze backend generates. 
The MicroBlaze backend was generating stack layouts that did not
conform correctly to the ABI. This update generates stack layouts
which are closer to what GCC does.

Variable arguments support was added as well but the stack layout
for varargs has not been finalized.

llvm-svn: 97807
 2010-03-05 15:26:02 +00:00
Wesley Peck e4801e49c9 Adding the MicroBlaze backend. 
The MicroBlaze is a highly configurable 32-bit soft-microprocessor for
use on Xilinx FPGAs. For more information see:
http://www.xilinx.com/tools/microblaze.htm
http://en.wikipedia.org/wiki/MicroBlaze

The current LLVM MicroBlaze backend generates assembly which can be
compiled using the an appropriate binutils assembler.

llvm-svn: 96969
 2010-02-23 19:15:24 +00:00