https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87033
Bug ID: 87033
Summary: The compiler does not generate the LWAX instruction
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: meissner at gcc dot gnu.org
Target Milestone: ---
Created attachment 44566
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44566&action=edit
Simple test case to show the bug
The compiler does not generate LWAX instruction to load up a 32-bit integer
value and sign extend it to 64-bits. This is due to the constraint for
extendsi<mode>2 for the LWA being just 'Y' (offset addressing using DS mode
instruction format) and it should be 'YZ'.
