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cd5029d001
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Sanjoy Das cd5029d001 [SCEV] Unify getUnsignedRange and getSignedRange 
Summary:
This removes some duplicated code, and also helps optimization: e.g. in
the test case added, `%idx ULT 128` in `@x` is not currently optimized
to `true` by `-indvars` but will be, after this change.

The only functional change in ths commit is that for add recurrences,
ScalarEvolution::getRange will be more aggressive -- computing the
unsigned (resp. signed) range for a SCEVAddRecExpr will now look at the
NSW (resp. NUW) bits and check for signed (resp. unsigned) overflow.
This can be a strict improvement in some cases (such as the attached
test case), and should be no worse in other cases.

Reviewers: atrick, nlewycky

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8142

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231709 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-09 21:43:43 +00:00
autoconf Drop the hacks used for partial C99 math libraries. 2015-03-09 18:35:18 +00:00
bindings Go bindings: use MDNode::replaceAllUsesWith instead of MDTuple::replaceAllUsesWith. 2015-03-05 22:55:38 +00:00
cmake Drop the hacks used for partial C99 math libraries. 2015-03-09 18:35:18 +00:00
docs Introduce runtime unrolling disable matadata and use it to mark the scalar loop from vectorization. 2015-03-09 06:14:18 +00:00
examples Fix the build of the gold-plugin and examples. 2015-03-04 19:15:29 +00:00
include [SCEV] Unify getUnsignedRange and getSignedRange 2015-03-09 21:43:43 +00:00
lib [SCEV] Unify getUnsignedRange and getSignedRange 2015-03-09 21:43:43 +00:00
projects Reverse the order libc++ and libc++abi are added in CMake. 2015-03-04 01:16:43 +00:00
test [SCEV] Unify getUnsignedRange and getSignedRange 2015-03-09 21:43:43 +00:00
tools Add support for Nuxi CloudABI. 2015-03-09 18:40:45 +00:00
unittests Add support for Nuxi CloudABI. 2015-03-09 18:40:45 +00:00
utils TableGen: Use 'enum : uint64_t' for feature flags to fix -Wmicrosoft 2015-03-09 20:23:14 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore Add one more vim swap file pattern 2015-01-30 21:59:28 +00:00
CMakeLists.txt Teach the LLVM CMake build how to explicitly use libc++abi when using 2015-03-07 10:30:34 +00:00
CODE_OWNERS.TXT [CODE_OWNERS] Change the ownership of register allocators. 2015-03-05 22:15:17 +00:00
configure Drop the hacks used for partial C99 math libraries. 2015-03-09 18:35:18 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Add a check for misbehaving -Wcomment from gcc-4.7 and add 2014-11-05 00:35:15 +00:00
Makefile.rules Add support for SunOS function/data sections and associated 2015-03-03 20:54:29 +00:00
README.txt Revert test commit 2015-02-04 18:46:00 +00:00

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