[all-commits] [llvm/llvm-project] 4a5899: [SCCP] Use constant ranges for PHI nodes.
Florian Hahn via All-commits
all-commits at lists.llvm.org
Thu Mar 19 05:46:20 PDT 2020
Branch: refs/heads/master
Home: https://github.com/llvm/llvm-project
Commit: 4a58996dd2d226063bc9703c4722e06a5d041b23
https://github.com/llvm/llvm-project/commit/4a58996dd2d226063bc9703c4722e06a5d041b23
Author: Florian Hahn <flo at fhahn.com>
Date: 2020-03-19 (Thu, 19 Mar 2020)
Changed paths:
M llvm/lib/Transforms/Scalar/SCCP.cpp
M llvm/test/Transforms/SCCP/binaryops-range-special-cases.ll
M llvm/test/Transforms/SCCP/ip-constant-ranges.ll
A llvm/test/Transforms/SCCP/ip-ranges-phis.ll
A llvm/test/Transforms/SCCP/phis.ll
M llvm/test/Transforms/SCCP/range-and.ll
Log Message:
-----------
[SCCP] Use constant ranges for PHI nodes.
For PHIs with multiple incoming values, we can improve precision by
using constant ranges for integers. We can over-approximate phis
by merging the incoming values.
Reviewers: davide, efriedma, mssimpso
Reviewed By: efriedma
Differential Revision: https://reviews.llvm.org/D71933
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