Commit Graph

3 Commits

Author SHA1 Message Date
Florian Hahn 292077072e
[Local] Treat calls that may not return as being alive.
With the addition of the `willreturn` attribute, functions that may
not return (e.g. due to an infinite loop) are well defined, if they are
not marked as `willreturn`.

This patch updates `wouldInstructionBeTriviallyDead` to not consider
calls that may not return as dead.

This patch still provides an escape hatch for intrinsics, which are
still assumed as willreturn unconditionally. It will be removed once
all intrinsics definitions have been reviewed and updated.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D94106
2021-01-23 16:05:14 +00:00
Arthur Eubanks 61ac58e10a [NewPM] Pin tests with -debug-pass to legacy PM
-debug-pass is a legacy PM only option.

Some tests checks that the pass returned that it made a change,
which is not relevant to the NPM, since passes return PreservedAnalyses.

Some tests check that passes are freed at the proper time, which is also
not relevant to the NPM.

Reviewed By: asbirlea

Differential Revision: https://reviews.llvm.org/D87945
2020-09-22 17:54:25 -07:00
Bjorn Pettersson d218a3326e [InstSimplify] Report "Changed" also when only deleting dead instructions
Summary:
Make sure that we report that changes has been made
by InstSimplify also in situations when only trivially
dead instructions has been removed. If for example a call
is removed the call graph must be updated.

Bug seem to have been introduced by llvm-svn r367173
(commit 02b9e45a7e), since the code in question
was rewritten in that commit.

Reviewers: spatel, chandlerc, foad

Reviewed By: spatel

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65973

llvm-svn: 368401
2019-08-09 07:08:25 +00:00