http://llvm.org/bugs/show_bug.cgi?id=21518
Bug ID: 21518
Summary: addvsi3 & subvsi3 don't trap when they should
Product: compiler-rt
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: compiler-rt
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 13307
--> http://llvm.org/bugs/attachment.cgi?id=13307&action=edit
Patch fixing the issue
The code in {add,sub}v.i3 routines does not trap when it should, because it
performs the actual add/subtract operation in signed arithmetic, rather than
unsigned. I found this when GCC incorrectly uses the symbols from Mac OS X
Yosemite's libcompiler_rt.dylib, and those fail to abort when they should.
(Original GCC bug report is here, explaining some of the context:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62018).
The attached patch fixes it. I hope it can help.
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