https://llvm.org/bugs/show_bug.cgi?id=23464
Bug ID: 23464
Summary: [SSE] Scalar users should be able to fold
MOVZQI2PQIrm/MOVDI2PDIrm
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
It's trickier than MOVSS/MOVSD because they zero the upper lanes, but if we're
able to recognize that a load feeds into a scalar op (PR23349), this is
probably as easy as canFoldLoad=1 on QI2PQI/DI2PDI.
It's also much less useful, because most integer domain instructions are packed
anyway. There are a few that aren't though; consider:
_mm256_broadcastq_epi64(_mm_loadl_epi64(src))
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
