Chris Lattner b14ab8a10d Teach the dag combiner to turn a truncate/sign_extend pair into a sextinreg ...

when the types match up.  This allows the X86 backend to compile:

sbyte %toggle_value(sbyte* %tmp.1) {
        %tmp.2 = load sbyte* %tmp.1
        ret sbyte %tmp.2
}

to this:

_toggle_value:
        mov %EAX, DWORD PTR [%ESP + 4]
        movsx %EAX, BYTE PTR [%EAX]
        ret

instead of this:

_toggle_value:
        mov %EAX, DWORD PTR [%ESP + 4]
        movsx %EAX, BYTE PTR [%EAX]
        movsx %EAX, %AL
        ret

noticed in Shootout/objinst.

-Chris


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24630 91177308-0d34-0410-b5e6-96231b3b80d8

2005-12-07 07:11:03 +00:00

..

SelectionDAG

Teach the dag combiner to turn a truncate/sign_extend pair into a sextinreg

2005-12-07 07:11:03 +00:00

AsmPrinter.cpp

Teach the SelectionDAG ISel how to turn ConstantPacked values into

2005-12-06 06:18:55 +00:00

BranchFolding.cpp

Remove trailing whitespace

2005-04-21 22:36:52 +00:00

ELFWriter.cpp

nuke blank line

2005-11-10 18:49:46 +00:00

IntrinsicLowering.cpp

continued readcyclecounter support

2005-11-11 16:47:30 +00:00

LiveInterval.cpp

Fix LiveInterval::getOverlapingRanges to take things in the right order

2005-10-21 06:41:30 +00:00

LiveIntervalAnalysis.cpp

Fix some spello's pointed out by Gabor Greif

2005-10-26 18:41:41 +00:00

LiveVariables.cpp

Add section switching to common code generator code. Add a couple of

2005-11-21 07:06:27 +00:00

MachineBasicBlock.cpp

Remove trailing whitespace

2005-04-21 22:36:52 +00:00

MachineCodeEmitter.cpp

new is not a valid default anywhere, so make this pure virtual

2005-07-28 18:13:59 +00:00

MachineFunction.cpp

Added graphviz/gv support for MF.

2005-10-12 12:09:05 +00:00

MachineInstr.cpp

Remove trailing whitespace

2005-04-21 22:36:52 +00:00

Makefile

Change Library Names Not To Conflict With Others When Installed

2004-10-27 23:18:45 +00:00

Passes.cpp

Alkis agrees that that iterative scan allocator isn't going to be worked on

2005-10-24 04:14:30 +00:00

PHIElimination.cpp

clean up this code a bit, no functionality change

2005-10-03 07:22:07 +00:00

PhysRegTracker.h

Improved PhysRegTracker interface. RegAlloc lazily allocates the register tracker using a std::auto_ptr

2004-02-23 06:10:13 +00:00

PrologEpilogInserter.cpp

Always compute max align.

2005-11-06 17:43:20 +00:00

RegAllocLinearScan.cpp

I think I know what you meant here, but just to be safe I'll let you

2005-11-21 14:09:40 +00:00

RegAllocLocal.cpp

Nuke noop copies.

2005-11-09 18:22:42 +00:00

RegAllocSimple.cpp

Change this code ot pass register classes into the stack slot spiller/reloader

2005-09-30 01:29:00 +00:00

TwoAddressInstructionPass.cpp

Fix some spello's pointed out by Gabor Greif

2005-10-26 18:41:41 +00:00

UnreachableBlockElim.cpp

Remove trailing whitespace

2005-04-21 22:36:52 +00:00

VirtRegMap.cpp

Fix the LLC regressions on X86 last night. In particular, when undoing

2005-10-06 17:19:06 +00:00

VirtRegMap.h

Remove trailing whitespace

2005-04-21 22:36:52 +00:00