http://llvm.org/bugs/show_bug.cgi?id=20676
Bug ID: 20676
Summary: [AVX512] unnecessary register spill and immediate
refill before function call
Product: new-bugs
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 12904
--> http://llvm.org/bugs/attachment.cgi?id=12904&action=edit
test case
With top of tree and the attached test case, running "llc -mcpu=knl
-filetype=asm bug.ll -o -" has the following in the generated code. The reload
at least is unnecessary, I believe...
vmovups %zmm0, 128(%rsp) ## 64-byte Spill
vmovups 128(%rsp), %zmm0 ## 64-byte Reload
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