[llvm-dev] Is the correct behavior of getelementptr i192* for opt + llc -march=aarch64?

[MITSUNARI Shigeo via llvm-dev]

Hi all,
opt and opt + llc generate the difference aarch64 asm code for the following LLVM code.

Is it intended behavior?
I expected (A) because I cast %p from i192* to i64*.
The information is dropped by opt and 8-byte padding is inserted or I write a bad code?

% cat a.ll
define void @store0_to_p4(i192* %p)
{
  %p1 = bitcast i192* %p to i64*
  %p2 = getelementptr i64, i64* %p1, i64 3
  %p3 = getelementptr i64, i64* %p2, i64 1
  store i64 0, i64* %p3
  ret void
}

% llc-3.8 a.ll -O3 -o - -march=aarch64
store0_to_p4:
  str     xzr, [x0, #32] ; (A)
  ret

% opt-3.8 -O3 a.ll -o - | llc-3.8 -O3 -o - -march=aarch64
store0_to_p4:
  str     xzr, [x0, #40] ; (B)
  ret

Yours,
 Shigeo