| Matthias Braun | 3b36533 | 2015-03-18 17:56:09 +0000 | [diff] [blame] | 1 | ; RUN: llc -o - %s -verify-machineinstrs |
| 2 | ; This used to crash when coalescing a regclass like GR16 which did not support |
| 3 | ; the sub_8bit_hi subregister with a class like GR16_ABCD that did. |
| 4 | target triple = "x86_64-apple-macosx10.10.0" |
| 5 | |
| 6 | define void @test() #0 { |
| 7 | entry: |
| 8 | br i1 undef, label %loop, label %for.end597 |
| 9 | |
| 10 | loop: |
| 11 | %0 = load i16, i16* null, align 4 |
| 12 | %1 = load i16, i16* undef, align 4 |
| 13 | %or1 = or i16 %1, %0 |
| 14 | %or2 = trunc i16 %or1 to i8 |
| 15 | store i8 %or2, i8* undef, align 4 |
| 16 | %2 = or i16 %1, %0 |
| 17 | %or3 = lshr i16 %2, 8 |
| 18 | %or4 = trunc i16 %or3 to i8 |
| 19 | store i8 %or4, i8* undef, align 1 |
| 20 | %3 = load i32, i32* undef, align 4 |
| 21 | %4 = load i32, i32* undef, align 4 |
| 22 | %or5 = or i32 %4, %3 |
| 23 | store i32 %or5, i32* undef, align 4 |
| 24 | store i32 0, i32* undef, align 4 |
| 25 | br label %loop |
| 26 | |
| 27 | for.end597: |
| 28 | ret void |
| 29 | } |