https://bugs.llvm.org/show_bug.cgi?id=47788
Bug ID: 47788
Summary: [InstCombiner] fatal error: error in backend:
Instruction Combining seems stuck in an infinite loop
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Created attachment 24041
--> https://bugs.llvm.org/attachment.cgi?id=24041&action=edit
original preprocessed test case (csmith)
clang -O3 -march=arch13 crash2.i -o a.out -w -mllvm -unroll-count=10 -mllvm
-enable-tbaa=false -mllvm -instcombine-infinite-loop-threshold=200
crash2.i (reduced):
short a, b, d;
int c, e;
long f;
short(g)() { return a < 0 || c ? : 0; }
void h(int *i) {
long *j = &f;
d = 0;
for (; d != 34; d++) {
b = -7;
for (; b; b = b + 1) {
e &= g() | 5;
e |= 0 >= 0;
*i |= d;
*j = *i;
}
}
}
void main() {}
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