https://bugs.llvm.org/show_bug.cgi?id=43679
Bug ID: 43679
Summary: [LoopDataPrefetch] Creates prefetch 3.5 terabytes
ahead
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Loop Optimizer
Assignee: unassignedb...@nondot.org
Reporter: pauls...@linux.vnet.ibm.com
CC: llvm-bugs@lists.llvm.org
Created attachment 22671
--> https://bugs.llvm.org/attachment.cgi?id=22671&action=edit
reduced testcase
NextLSCEV for the load in LoopDataPrefetch is
{(3564822854692 + @0),+,21474836474}<%bb6>
This seems to disappear if I revert 354ba69 "[CVP} Replace SExt with ZExt if
the input is known-non-negative".
bin/llc -mcpu=z13 -O1 -o - tc_loopdpf_oor.opt.ll
...
larl %r1, __unnamed_1+3564822854692
...
This results in a linker error "relocation truncated to fit".
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