https://llvm.org/bugs/show_bug.cgi?id=25444
Bug ID: 25444
Summary: [WinEH] Tail duplication pass asserts in the presence
of catchpads
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Common Code Generator Code
Assignee: unassignedb...@nondot.org
Reporter: david.majne...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
consider:
void g(void *, bool);
void f(int b, void *c) {
bool a = false;
try {
g(c, b);
a = true;
} catch (...) {
}
g(c, a);
}
run with:
clang -cc1 -triple i686-pc-windows-msvc18.0.0 -emit-obj -fcxx-exceptions
-fexceptions -O2 dll_main-fd2b3b.ii -o - -emit-llvm
we crash here:
lib/CodeGen/TailDuplication.cpp:624: bool <anonymous
namespace>::TailDuplicatePass::shouldTailDuplicate(const llvm::MachineFunction
&, bool, llvm::MachineBasicBlock &): Assertion `Idx != 0' failed.
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