[X86] IR execution test fails with -O0 opt-level on haswell #33940
Description
| Bugzilla Link | 34592 |
| Resolution | FIXED |
| Resolved on | Jan 30, 2018 02:31 |
| Version | trunk |
| OS | All |
| Blocks | #35152 |
| Attachments | execution test that fails |
| CC | @topperc,@zmodem,@RKSimon,@rotateright,@ZviRackover |
Extended Description
Attached is an IR execution test including a chain of shufflevector and select instructions.
The test fails when compiling with "-O0 -march=haswell" flags.
Run the following on a haswell machine to reproduce:
clang -O0 -march=haswell exec_test_fail.ll -o exec_test_fail.exe
./exec_test_fail.exe
===============================================================================
FAIL: lane 2, expected 153, found 0