| ; This test checks that after SelectionDAG runs, DAGCombiner can combine a |
| ; load and a zext instruction without crashing in tryToFoldExtOfLoad(), |
| ; even when the folded load result is still used along the truncate |
| ; replacement path. |
| |
| ; RUN: llc -O3 -mtriple=x86_64-unknown-linux-gnu -filetype=null < %s |
| |
| @ak = external global i16 |
| @s = external global i16 |
| |
| define i32 @main() { |
| entry: |
| %0 = load i16, ptr @ak, align 2 |
| %1 = load volatile i16, ptr @s, align 2 |
| %2 = load i16, ptr @ak, align 2 |
| %3 = xor i16 %2, -1 |
| %conv4211404 = zext i16 %3 to i64 |
| %xor422 = xor i64 1, %conv4211404 |
| %conv3591399 = zext i16 %0 to i64 |
| %or424 = or i64 %xor422, %conv3591399 |
| %conv333 = sext i16 %0 to i32 |
| %conv434 = zext i16 %2 to i32 |
| %4 = trunc i64 %or424 to i32 |
| %or436 = or i32 %conv434, %4 |
| %conv453 = xor i32 %conv333, %or436 |
| ret i32 %conv453 |
| } |
