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Mehdi Amini 4c8f5afd99 InstCombine: fix fold "fcmp x, undef" to account for NaN 
Summary:
See the two test cases.

; Can fold fcmp with undef on one side by choosing NaN for the undef

; Can fold fcmp with undef on both side
;   fcmp u_pred undef, undef -> true
;   fcmp o_pred undef, undef -> false
; because whatever you choose for the first undef
; you can choose NaN for the other undef

Reviewers: hfinkel, chandlerc, majnemer

Reviewed By: majnemer

Subscribers: majnemer, llvm-commits

Differential Revision: http://reviews.llvm.org/D7617

From: Mehdi Amini <mehdi.amini@apple.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231626 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-09 03:20:25 +00:00
autoconf
bindings Go bindings: use MDNode::replaceAllUsesWith instead of MDTuple::replaceAllUsesWith. 2015-03-05 22:55:38 +00:00
cmake Teach the LLVM CMake build how to explicitly use libc++abi when using 2015-03-07 10:30:34 +00:00
docs CodingStyle: Allow delegating ctors 2015-03-06 13:46:50 +00:00
examples Fix the build of the gold-plugin and examples. 2015-03-04 19:15:29 +00:00
include InstCombine: fix fold "fcmp x, undef" to account for NaN 2015-03-09 03:20:25 +00:00
lib InstCombine: fix fold "fcmp x, undef" to account for NaN 2015-03-09 03:20:25 +00:00
projects Reverse the order libc++ and libc++abi are added in CMake. 2015-03-04 01:16:43 +00:00
test InstCombine: fix fold "fcmp x, undef" to account for NaN 2015-03-09 03:20:25 +00:00
tools Adding parenthesis around logical expressions to silence a -Wparentheses warning; NFC. 2015-03-07 15:16:27 +00:00
unittests [ConstantRange] Teach multiply to be cleverer about signed ranges. 2015-03-06 15:50:47 +00:00
utils TableGen: Initialize ErrorInfo to ~0ULL in the MatchInstructionImpl 2015-03-05 19:46:55 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore
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
CREDITS.TXT
LICENSE.TXT Remove projects/sample. 2014-03-12 22:40:22 +00:00
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in
Makefile.rules
README.txt Revert test commit 2015-02-04 18:46:00 +00:00

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