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Author SHA1 Message Date
Roman Lebedev 2d07414ee5
[SimplifyCFG] Teach simplifyUnreachable() to preserve DomTree 
Pretty boring, removeUnwindEdge() already known how to update DomTree,
so if we are to call it, we must first flush our own pending updates;
otherwise, we just stop predecessors from branching to us,
and for certain predecessors, stop their predecessors from
branching to them also.
 2020-12-18 00:37:22 +03:00
Arthur Eubanks 5c31b8b94f Revert "Use uint64_t for branch weights instead of uint32_t" 
This reverts commit 10f2a0d662.

More uint64_t overflows.
 2020-10-31 00:25:32 -07:00
Arthur Eubanks 10f2a0d662 Use uint64_t for branch weights instead of uint32_t 
CallInst::updateProfWeight() creates branch_weights with i64 instead of i32.
To be more consistent everywhere and remove lots of casts from uint64_t
to uint32_t, use i64 for branch_weights.

Reviewed By: davidxl

Differential Revision: https://reviews.llvm.org/D88609
 2020-10-30 10:03:46 -07:00
Nico Weber 2a4e704c92 Revert "Use uint64_t for branch weights instead of uint32_t" 
This reverts commit e5766f25c6.
Makes clang assert when building Chromium, see https://crbug.com/1142813
for a repro.
 2020-10-27 09:26:21 -04:00
Arthur Eubanks e5766f25c6 Use uint64_t for branch weights instead of uint32_t 
CallInst::updateProfWeight() creates branch_weights with i64 instead of i32.
To be more consistent everywhere and remove lots of casts from uint64_t
to uint32_t, use i64 for branch_weights.

Reviewed By: davidxl

Differential Revision: https://reviews.llvm.org/D88609
 2020-10-26 20:24:04 -07:00
Yevgeny Rouban ee62c40eae [SimplifyCFG] Fix prof branch_weights MD while removing unreachable switch cases 
SimplifyCFG has a bug that results in inconsistent prof branch_weights metadata
if unreachable switch cases are removed. This patch fixes this bug by making use
of the newly introduced SwitchInstProfUpdateWrapper class (see patch D62122).
A new test is created.

Differential Revision: https://reviews.llvm.org/D62186

llvm-svn: 363527
 2019-06-17 05:55:12 +00:00