This fixes another reproducer from https://bugs.llvm.org/show_bug.cgi?id=51615
And again, the fix lies not in the code added in D105390
In this case, we completely don't check that the "broadcast-from-mem" we create
can actually fold the load. In this case, it's operand was not a load at all:
Combining: t16: v8i32 = vector_shuffle<0,u,u,u,0,u,u,u> t14, undef:v8i32 Creating new node: t29: i32 = undef RepeatLoad: t8: i32 = truncate t7 t7: i64 = extract_vector_elt t5, Constant:i64<0> t5: v2i64,ch = load<(load (s128) from %ir.arg)> t0, t2, undef:i64 t2: i64,ch = CopyFromReg t0, Register:i64 %0 t1: i64 = Register %0 t4: i64 = undef t3: i64 = Constant<0> Combining: t15: v8i32 = undef
clang-tidy: warning: invalid case style for function 'MayFoldLoad' [readability-identifier-naming]
not useful