4 Commits

Author	SHA1	Message	Date
Vitaly Buka	e7bac3b9fa	[msan] Convert Msan to ModulePass ... MemorySanitizerPass function pass violatied requirement 4 of function pass to do not insert globals. Msan nees to insert globals for origin tracking, and paramereters tracking. https://llvm.org/docs/WritingAnLLVMPass.html#the-functionpass-class Reviewed By: kstoimenov, fmayer Differential Revision: https://reviews.llvm.org/D133336	2022-09-06 15:01:04 -07:00
Arthur Eubanks	15fefcb9eb	[opt] Directly translate -O# to -passes='default<O#>' ... Right now when we see -O# we add the corresponding 'default<O#>' into the list of passes to run when translating legacy -pass-name. This has the side effect of not using the default AA pipeline. Instead, treat -O# as -passes='default<O#>', but don't allow any other -passes or -pass-name. I think we can keep `opt -O#` as shorthand for `opt -passes='default<O#>` but disallow anything more than just -O#. Tests need to be updated to not use `opt -O# -pass-name`. Reviewed By: asbirlea Differential Revision: https://reviews.llvm.org/D112036	2021-10-18 16:48:10 -07:00
Gui Andrade	b0ffa8befe	[MSAN] Pass Origin by parameter to __msan_warning functions ... Summary: Normally, the Origin is passed over TLS, which seems like it introduces unnecessary overhead. It's in the (extremely) cold path though, so the only overhead is in code size. But with eager-checks, calls to __msan_warning functions are extremely common, so this becomes a useful optimization. This can save ~5% code size. Reviewers: eugenis, vitalybuka Reviewed By: eugenis, vitalybuka Subscribers: hiraditya, #sanitizers, llvm-commits Tags: #sanitizers, #llvm Differential Revision: https://reviews.llvm.org/D81700	2020-06-15 17:49:18 -07:00
Evgeniy Stepanov	464df87288	Handle llvm.launder.invariant.group in msan. ... Summary: [MSan] handle llvm.launder.invariant.group Msan used to give false-positives in class Foo { public: virtual ~Foo() {}; }; // Return true iff *x is set. bool f1(void **x, bool flag); Foo* f() { void *p; bool found; found = f1(&p,flag); if (found) { // p is always set here. return static_cast<Foo*>(p); // False positive here. } return nullptr; } Patch by Ilya Tokar. Reviewers: #sanitizers, eugenis Reviewed By: #sanitizers, eugenis Subscribers: eugenis, Prazek, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D68236 llvm-svn: 373515	2019-10-02 19:53:19 +00:00