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| author | Craig Topper <craig.topper@intel.com> | 2018-08-22 18:24:13 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2018-08-22 18:24:13 +0000 |
| commit | 87f78cfe15055f5ddc1756b65bb5ef6e0013153a (patch) | |
| tree | 2320d89a21be021a26c550d9188b7c0d5c14a5ee /clang/lib/Frontend/CompilerInvocation.cpp | |
| parent | ff363539c637c3078e3b6be886184ce327d2773a (diff) | |
| download | bcm5719-llvm-87f78cfe15055f5ddc1756b65bb5ef6e0013153a.tar.gz bcm5719-llvm-87f78cfe15055f5ddc1756b65bb5ef6e0013153a.zip | |
[X86] In OptimizeLEAs pass, check that the key is in the LEAs map before accessing
When the key is not already in the map, the access operator[] creates an empty value and grows the map.
Resizing a map is very slow, so this needs to be avoided.
Found with csmith + asserts.
May help with
https://bugs.llvm.org/show_bug.cgi?id=25843
Patch by Tom Rix.
Differential Revision: https://reviews.llvm.org/D50780
llvm-svn: 340434
Diffstat (limited to 'clang/lib/Frontend/CompilerInvocation.cpp')
0 files changed, 0 insertions, 0 deletions
