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fannkuch
2018 Mar 23
1
stack dump at -early-cse-memssa twice
Hello,
while invoking opt with all possible optimization pairs I stumbled over
a stack dump when doing -early-cse-memssa twice:
$ clang -Xclang -disable-O0-optnone -S -o fannkuch7.ll -emit-llvm fannkuch7.c
$ opt -S -o fannkuch7.ll -early-cse-memssa -early-cse-memssa fannkuch7.ll
Questions:
Is it illegal to call -early-cse-memssa twice?
Are there any other incompatible optimization orders?
Best,
HwJ
---
$ clang --version
> clang version 6.0.0 (tags/RELEASE_600/final...