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authorTaiju Tsuiki <tzik@google.com>2018-06-19 04:39:07 +0000
committerTaiju Tsuiki <tzik@google.com>2018-06-19 04:39:07 +0000
commitb000a8860e9ec26f4a2834dbeaba44cd27025306 (patch)
treeacb0e6018e9e3cfc7fc0c3efaf2eace9de21fb69 /llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
parentc2965214efbd35ed54e08cce042e8eed778646aa (diff)
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Update NRVO logic to support early return (Attempt 2)
Summary: This is the second attempt of r333500 (Update NRVO logic to support early return). The previous one was reverted for a miscompilation for an incorrect NRVO set up on templates such as: ``` struct Foo {}; template <typename T> T bar() { T t; if (false) return T(); return t; } ``` Where, `t` is marked as non-NRVO variable before its instantiation. However, while its instantiation, it's left an NRVO candidate, turned into an NRVO variable later. Reviewers: rsmith Reviewed By: rsmith Subscribers: cfe-commits Differential Revision: https://reviews.llvm.org/D47586 llvm-svn: 335019
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