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| author | Andrea Di Biagio <Andrea_DiBiagio@sn.scee.net> | 2016-12-07 12:31:36 +0000 |
|---|---|---|
| committer | Andrea Di Biagio <Andrea_DiBiagio@sn.scee.net> | 2016-12-07 12:31:36 +0000 |
| commit | ae5780104f1a784f5dffc6058125f6c686248ae9 (patch) | |
| tree | 3cbc7bc55dad102484a58dd68c3c892fe40d12aa /llvm/lib/CodeGen/ResetMachineFunctionPass.cpp | |
| parent | 8893bd95f01538580eac61b65de48ee2a83d0763 (diff) | |
| download | bcm5719-llvm-ae5780104f1a784f5dffc6058125f6c686248ae9.tar.gz bcm5719-llvm-ae5780104f1a784f5dffc6058125f6c686248ae9.zip | |
When GVN removes a redundant load, it should not modify the debug location of the dominating load.
In the case of a fully redundant load LI dominated by an equivalent load V, GVN
should always preserve the original debug location of V. Otherwise, we risk to
introduce an incorrect stepping.
If V has debug info, then clearly it should not be modified. If V has a null
debugloc, then it is still potentially incorrect to propagate LI's debugloc
because LI may not post-dominate V.
Differential Revision: https://reviews.llvm.org/D27468
llvm-svn: 288903
Diffstat (limited to 'llvm/lib/CodeGen/ResetMachineFunctionPass.cpp')
0 files changed, 0 insertions, 0 deletions
