[llvm-bugs] [Bug 33022] New: Options '-optimize-regalloc=false -regalloc=greedy' allowed and failing
llvm-bugs at lists.llvm.org
Fri May 12 04:53:51 PDT 2017
Bug ID: 33022
Summary: Options '-optimize-regalloc=false -regalloc=greedy'
allowed and failing
Component: Register Allocator
Assignee: unassignedbugs at nondot.org
Reporter: paulsson at linux.vnet.ibm.com
CC: llvm-bugs at lists.llvm.org
I discovered that the use of these two options made a lot of vregs survive the
greedy register allocator. Eventually this was displayed:
MachineFunctionProperties required by Prologue/Epilogue Insertion & Frame
Finalization pass are not met by function autogen_SD13131.
Required properties: NoVRegs
Current properties: NoPHIs, TracksLiveness
MachineFunctionProperties check failed
My guess is that this is something that would never work. It seems to me that
perhaps this combination of options should not be allowed, in case a novice
user happens to try it?
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