https://bugs.llvm.org/show_bug.cgi?id=46501
Bug ID: 46501
Summary: Loop with optimiser crashes simple coroutines
Product: clang
Version: 10.0
Hardware: All
OS: All
Status: NEW
Severity: release blocker
Priority: P
Component: C++2a
Assignee: unassignedclangb...@nondot.org
Reporter: wyat...@gmail.com
CC: blitzrak...@gmail.com, erik.pilking...@gmail.com,
llvm-bugs@lists.llvm.org, richard-l...@metafoo.co.uk
Created attachment 23655
--> https://bugs.llvm.org/attachment.cgi?id=23655&action=edit
Short main.cpp shows simplified problem code
A simple loop (even one round only) will crash the LLVM frontend if it contains
a coroutine co_await. So...
A f() {
for (int i=0; i<1; i++)
{
co_await suspend_always{};
}
}
...crashes the llvm front-end (I believe) when used with -Os or -O2, but the
following code (with the for statement removed) works fine:
A f() {
co_await suspend_always{};
}
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