Unreachable in AArch64LoadStoreOptimizer (Opcode has no post-indexed wise equivalent!) #33382
Description
| Bugzilla Link | 34035 |
| Resolution | FIXED |
| Resolved on | Aug 18, 2017 13:25 |
| Version | trunk |
| OS | All |
| Blocks | #33196 |
| CC | @RKSimon,@TNorthover |
Extended Description
Given a silly GEP index (of -1), we can hit an unreachable in AArch64LoadStoreOptimizer. Repros with llc -o - bug.ll.
target triple = "arm64-apple-ios"
define void @bug() {
%xP16x4 = alloca <4 x i16>, align 8
%__a = alloca <4 x i16>, align 8
%__b = alloca <4 x i16>, align 8
%G = getelementptr <4 x i16>, <4 x i16>* %__b, i32 -1
store <4 x i16> zeroinitializer, <4 x i16>* %G, align 8
ret void
}