| ; RUN: llc < %s -mtriple=thumbv7-apple-ios -mcpu=cortex-a8 -regalloc=fast | FileCheck %s -check-prefix=A8 |
| ; RUN: llc < %s -mtriple=thumbv7-apple-ios -mcpu=cortex-m3 -regalloc=fast | FileCheck %s -check-prefix=M3 |
| ; rdar://6949835 |
| |
| ; Magic ARM pair hints works best with linearscan / fast. |
| |
| ; Cortex-M3 errata 602117: LDRD with base in list may result in incorrect base |
| ; register when interrupted or faulted. |
| |
| @b = external global i64* |
| |
| define i64 @t(i64 %a) nounwind readonly { |
| entry: |
| ; A8: t: |
| ; A8: ldrd r2, r3, [r2] |
| |
| ; M3: t: |
| ; M3-NOT: ldrd |
| ; M3: ldm.w r2, {r2, r3} |
| |
| %0 = load i64** @b, align 4 |
| %1 = load i64* %0, align 4 |
| %2 = mul i64 %1, %a |
| ret i64 %2 |
| } |
