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Mirror of https://github.com/RPCS3/llvm-mirror
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a13d75f270
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Chris Lattner a13d75f270 Handle negative strides much more optimally. This compiles X86/lsr-negative-stride.ll 
into:

_t:
        movl 8(%esp), %ecx
        movl 4(%esp), %eax
        cmpl %ecx, %eax
        je LBB1_3       #bb17
LBB1_1: #bb
        cmpl %ecx, %eax
        jg LBB1_4       #cond_true
LBB1_2: #cond_false
        subl %eax, %ecx
        cmpl %ecx, %eax
        jne LBB1_1      #bb
LBB1_3: #bb17
        ret
LBB1_4: #cond_true
        subl %ecx, %eax
        cmpl %ecx, %eax
        jne LBB1_1      #bb
        jmp LBB1_3      #bb17

instead of:

_t:
        subl $4, %esp
        movl %esi, (%esp)
        movl 12(%esp), %ecx
        movl 8(%esp), %eax
        cmpl %ecx, %eax
        je LBB1_4       #bb17
LBB1_1: #bb.outer
        movl %ecx, %edx
        negl %edx
LBB1_2: #bb
        cmpl %ecx, %eax
        jle LBB1_5      #cond_false
LBB1_3: #cond_true
        addl %edx, %eax
        cmpl %ecx, %eax
        jne LBB1_2      #bb
LBB1_4: #bb17
        movl (%esp), %esi
        addl $4, %esp
        ret
LBB1_5: #cond_false
        movl %ecx, %edx
        subl %eax, %edx
        movl %eax, %esi
        addl %esi, %esi
        cmpl %ecx, %esi
        je LBB1_4       #bb17
LBB1_6: #cond_false.bb.outer_crit_edge
        movl %edx, %ecx
        jmp LBB1_1      #bb.outer

llvm-svn: 37252
2007-05-19 01:22:21 +00:00
autoconf Make Perl a required dependency and cause configure script to fail if it 2007-05-17 18:06:19 +00:00
docs Fix typo. 2007-05-18 09:04:20 +00:00
examples switch this to bitcode instead of bytecode 2007-05-06 09:29:13 +00:00
include better portability for intptr_t. 2007-05-18 07:07:05 +00:00
lib Handle negative strides much more optimally. This compiles X86/lsr-negative-stride.ll 2007-05-19 01:22:21 +00:00
projects avoid collision with /usr/bin/sample if this ever gets installed. 2007-02-18 03:03:41 +00:00
runtime crtend is only for llvm-gcc3, remove it. 2007-02-23 19:34:09 +00:00
test new testcase 2007-05-19 01:21:39 +00:00
tools Regenerate. 2007-05-18 05:48:07 +00:00
utils Rename M_PREDICATED to M_PREDICABLE; opcode can be specified isPredicable without having a PredicateOperand. 2007-05-16 20:45:24 +00:00
win32 Unbreak VC++ build. 2007-05-07 15:21:46 +00:00
Xcode Update project 2007-01-29 18:45:08 +00:00
.cvsignore Add llvm.spec, a generated file. 2006-10-18 19:23:56 +00:00
configure Regenerate. 2007-05-17 18:11:03 +00:00
CREDITS.TXT Update. 2007-05-07 17:58:13 +00:00
LICENSE.TXT bzip2 is gone 2007-05-06 23:18:44 +00:00
llvm.spec.in Minor technical correction in documentation. 2006-08-21 01:58:57 +00:00
Makefile Echo command lines only if the user wants them. 2007-04-15 06:22:48 +00:00
Makefile.common
Makefile.config.in Add support for determining which languages the llvm-gcc front end 2007-04-21 21:28:12 +00:00
Makefile.rules Fix a problem with building .y files when BISON is not present. 2007-05-17 22:51:35 +00:00
README.txt test 2007-04-20 20:49:25 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for the Low Level 
Virtual Machine, a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments. 

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the HTML documentation provided in docs/index.html for further
assistance with LLVM.