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mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-10-22 20:43:44 +02:00
llvm-mirror/lib/Transforms
Hal Finkel 6122fb79cb Add an Assumption-Tracking Pass
This adds an immutable pass, AssumptionTracker, which keeps a cache of
@llvm.assume call instructions within a module. It uses callback value handles
to keep stale functions and intrinsics out of the map, and it relies on any
code that creates new @llvm.assume calls to notify it of the new instructions.
The benefit is that code needing to find @llvm.assume intrinsics can do so
directly, without scanning the function, thus allowing the cost of @llvm.assume
handling to be negligible when none are present.

The current design is intended to be lightweight. We don't keep track of
anything until we need a list of assumptions in some function. The first time
this happens, we scan the function. After that, we add/remove @llvm.assume
calls from the cache in response to registration calls and ValueHandle
callbacks.

There are no new direct test cases for this pass, but because it calls it
validation function upon module finalization, we'll pick up detectable
inconsistencies from the other tests that touch @llvm.assume calls.

This pass will be used by follow-up commits that make use of @llvm.assume.

llvm-svn: 217334
2014-09-07 12:44:26 +00:00
..
Hello [CMake] Add LLVM_LINK_COMPONENTS to loadable modules, LLVMHello and BugpointPasses, on Win32. 2014-07-13 13:36:48 +00:00
InstCombine Add an Assumption-Tracking Pass 2014-09-07 12:44:26 +00:00
Instrumentation [asan] fix debug info produced for asan-coverage=2 2014-09-03 23:24:18 +00:00
IPO Add an Assumption-Tracking Pass 2014-09-07 12:44:26 +00:00
ObjCARC Simplify creation of a bunch of ArrayRefs by using None, makeArrayRef or just letting them be implicitly created. 2014-08-27 05:25:25 +00:00
Scalar Add an Assumption-Tracking Pass 2014-09-07 12:44:26 +00:00
Utils Add an Assumption-Tracking Pass 2014-09-07 12:44:26 +00:00
Vectorize Preserve IR flags (nsw, nuw, exact, fast-math) in SLP vectorizer (PR20802). 2014-09-03 17:40:30 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile