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LLVM backend for 6502
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0a1c997c27
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Chris Lattner 0a1c997c27 fix an x86 fast isel issue where we'd completely give up on folding an address 
when we have a global variable base an an index.  Instead, just give up on
folding the global variable.

Before we'd geenrate:

_test:                                  ## @test
## BB#0:
	movq	_rtx_length@GOTPCREL(%rip), %rax
	leaq	(%rax), %rax
	addq	%rdi, %rax
	movzbl	(%rax), %eax
	ret

now we generate:

_test:                                  ## @test
## BB#0:
	movq	_rtx_length@GOTPCREL(%rip), %rax
	movzbl	(%rax,%rdi), %eax
	ret

The difference is even more significant when there is a scale
involved.

This fixes rdar://9289558 - total fail with addr mode formation at -O0/x86-64


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129664 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-17 17:47:38 +00:00
autoconf Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
bindings
cmake Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
docs Introduce support to encode Objective-C property information in debugging information generated for an interface. 2011-04-16 00:11:51 +00:00
examples Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
include Fix rdar://9289512 - not folding load into compare at -O0 2011-04-17 06:35:44 +00:00
lib fix an x86 fast isel issue where we'd completely give up on folding an address 2011-04-17 17:47:38 +00:00
projects Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
runtime Write out uint64_t as i{0..32},i{33..64} instead of i{0..32},0. 2011-04-16 10:25:32 +00:00
test fix an x86 fast isel issue where we'd completely give up on folding an address 2011-04-17 17:47:38 +00:00
tools Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
unittests Implements StringRef::compare with bounds. It is behaves similarly to strncmp(). Unit tests also included. 2011-04-15 17:56:50 +00:00
utils Initial work to improve documentation for Clang's diagnostics, from Matthieu Monrocq 2011-04-15 22:04:07 +00:00
website
.gitignore
build-for-llvm-top.sh
CMakeLists.txt Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
configure Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
Makefile build: Add support for a SHOW_DIAGNOSTICS build variable. 2011-04-11 22:37:39 +00:00
Makefile.common
Makefile.config.in
Makefile.rules Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
ModuleInfo.txt
README.txt

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