| ; RUN: llc -o - %s -mtriple aarch64-- -mattr +slow-misaligned-128store -stop-after=instruction-select | FileCheck %s |
| ; Checks for a bug where selection dag store merging would construct wrong |
| ; indices when extracting values from vectors, resulting in an invalid |
| ; lane duplication in this case. |
| ; The only way I could trigger stores with mismatching types getting merged was |
| ; via the aarch64 slow-misaligned-128store code splitting stores earlier. |
| |
| ; CHECK-LABEL: name: func |
| ; CHECK: LDRQui |
| ; CHECK-NOT: INSERT_SUBREG |
| ; CHECK-NOT: DUP |
| ; CHECK-NEXT: STRQui |
| define void @func(<2 x double>* %sptr, <2 x double>* %dptr) { |
| %load = load <2 x double>, <2 x double>* %sptr, align 8 |
| ; aarch64 feature slow-misaligned-128store splits the following store. |
| ; store merging immediately merges it back together (but used to get the |
| ; merging wrong), this is the only way I was able to reproduce the bug... |
| store <2 x double> %load, <2 x double>* %dptr, align 4 |
| ret void |
| } |
