Hal Finkel 502475d4f3 Make processing @llvm.assume more efficient by using operand bundles ... There was an efficiency problem with how we processed @llvm.assume in ValueTracking (and other places). The AssumptionCache tracked all of the assumptions in a given function. In order to find assumptions relevant to computing known bits, etc. we searched every assumption in the function. For ValueTracking, that means that we did O(#assumes * #values) work in InstCombine and other passes (with a constant factor that can be quite large because we'd repeat this search at every level of recursion of the analysis). Several of us discussed this situation at the last developers' meeting, and this implements the discussed solution: Make the values that an assume might affect operands of the assume itself. To avoid exposing this detail to frontends and passes that need not worry about it, I've used the new operand-bundle feature to add these extra call "operands" in a way that does not affect the intrinsic's signature. I think this solution is relatively clean. InstCombine adds these extra operands based on what ValueTracking, LVI, etc. will need and then those passes need only search the users of the values under consideration. This should fix the computational-complexity problem. At this point, no passes depend on the AssumptionCache, and so I'll remove that as a follow-up change. Differential Revision: https://reviews.llvm.org/D27259 llvm-svn: 289755		2016-12-15 02:53:42 +00:00
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Coroutines	Fix spelling mistakes in Transforms comments. NFC.	2016-11-20 13:19:49 +00:00
Hello
InstCombine	Make processing @llvm.assume more efficient by using operand bundles	2016-12-15 02:53:42 +00:00
Instrumentation	[asan] Don't skip instrumentation of masked load/store unless we've seen a full load/store on that pointer.	2016-12-14 21:57:04 +00:00
IPO	Only sets profile summary when it was not preset.	2016-12-14 22:06:49 +00:00
ObjCARC	[CMake] NFC. Updating CMake dependency specifications	2016-11-17 04:36:50 +00:00
Scalar	Make processing @llvm.assume more efficient by using operand bundles	2016-12-15 02:53:42 +00:00
Utils	Replace APFloatBase static fltSemantics data members with getter functions	2016-12-14 11:57:17 +00:00
Vectorize	[LV] Don't vectorize when we have a small static bound on trip count	2016-12-13 20:38:18 +00:00
CMakeLists.txt	[coroutines] Part 3 of N: Adding Boilerplate for Coroutine Passes	2016-07-28 21:04:31 +00:00
LLVMBuild.txt	[coroutines] Part 3 of N: Adding Boilerplate for Coroutine Passes	2016-07-28 21:04:31 +00:00