https://bugs.llvm.org/show_bug.cgi?id=36270
Bug ID: 36270
Summary: [ValueTracking] Crash in computeKnownBitsFromAssume
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: llvm-...@redking.me.uk
CC: llvm-bugs@lists.llvm.org
Reduced from https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6033
define void @bar4(i32 %b) {
entry:
%B7 = xor i32 -1, 2147483647
%and1 = and i32 %b, 3
%B12 = lshr i32 %B7, %and1
%C1 = icmp ult i32 %and1, %B12
tail call void @llvm.assume(i1 %C1)
%cmp2 = icmp eq i32 0, %B12
tail call void @llvm.assume(i1 %cmp2)
unreachable
}
declare void @llvm.assume(i1)
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