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LLVM backend for 6502
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David Majnemer 594e4a1dd3 InstSimplify: Simplify trivial pointer expressions like b + (e - b) 
consider:
long long *f(long long *b, long long *e) {
  return b + (e - b);
}

we would lower this to something like:
define i64* @f(i64* %b, i64* %e) {
  %1 = ptrtoint i64* %e to i64
  %2 = ptrtoint i64* %b to i64
  %3 = sub i64 %1, %2
  %4 = ashr exact i64 %3, 3
  %5 = getelementptr inbounds i64* %b, i64 %4
  ret i64* %5
}

This should fold away to just 'e'.

N.B.  This adds m_SpecificInt as a convenient way to match against a
particular 64-bit integer when using LLVM's match interface.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216439 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-26 05:55:16 +00:00
autoconf Delete support for AuroraUX. 2014-08-14 15:15:09 +00:00
bindings [OCaml] Expose Llvm.get_operand_use. 2014-08-12 02:55:45 +00:00
cmake cmake: actually test -Wcomment 2014-08-23 21:10:58 +00:00
docs Declare that musttail calls in variadic functions forward the ellipsis 2014-08-26 00:33:28 +00:00
examples Modernize raw_fd_ostream's constructor a bit. 2014-08-25 18:16:47 +00:00
include InstSimplify: Simplify trivial pointer expressions like b + (e - b) 2014-08-26 05:55:16 +00:00
lib InstSimplify: Simplify trivial pointer expressions like b + (e - b) 2014-08-26 05:55:16 +00:00
projects [cmake] Use the external project machinery for libcxxabi so that it can 2014-07-25 10:27:40 +00:00
test InstSimplify: Simplify trivial pointer expressions like b + (e - b) 2014-08-26 05:55:16 +00:00
tools Modernize raw_fd_ostream's constructor a bit. 2014-08-25 18:16:47 +00:00
unittests Fix Path unittests on Windows after raw_fd_ostream changes 2014-08-26 00:24:23 +00:00
utils [SKX] avx512_icmp_packed multiclass extension 2014-08-25 14:49:34 +00:00
.arcconfig
.clang-format
.gitignore Add Polly to the ignored trees. 2014-06-25 13:13:36 +00:00
CMakeLists.txt Fix building with in-tree libc++abi on FreeBSD 2014-08-01 19:23:15 +00:00
CODE_OWNERS.TXT Add a sentence that all entries should include an email address. 2014-08-04 19:33:25 +00:00
configure Delete support for AuroraUX. 2014-08-14 15:15:09 +00:00
CREDITS.TXT Rise from the dead and update personal info 2014-08-25 17:51:04 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Track clang r213171 2014-07-16 16:50:34 +00:00
Makefile.rules Delete support for AuroraUX. 2014-08-14 15:15:09 +00:00
README.txt Trivial test commit. 2014-04-26 19:05:45 +00:00

README.txt 

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

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