forked from OSchip/llvm-project
f63a5e91db
Summary:
Most CPUs implementing AES fusion require instruction pairs of the form
AESE Vn, _
AESMC Vn, Vn
and
AESD Vn, _
AESIMC Vn, Vn
The constraint is added to AES(I)MC instructions which use the result of
an AES(E|D) instruction by using AES(I)MCTrr pseudo instructions, which
constraint source and destination registers to be the same.
A nice side effect of this change is that now all possible pairs are
scheduled back-to-back on the exynos-m1 for the misched-fusion-aes.ll
test case.
I had to update aes_load_store. The version I added initially was very
reduced and with the new constraint, AESE/AESMC could not be scheduled
back-to-back. I updated the test to be more realistic and still expose
the same scheduling problem as the initial test case.
Reviewers: t.p.northover, rengolin, evandro, kristof.beyls, silviu.baranga
Reviewed By: t.p.northover, evandro
Subscribers: aemerson, javed.absar, llvm-commits
Differential Revision: https://reviews.llvm.org/D35299
llvm-svn: 309495
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| .. | ||
| AArch64 | ||
| AMDGPU | ||
| ARM | ||
| AVR | ||
| AsmParser | ||
| COFF | ||
| Disassembler | ||
| ELF | ||
| Hexagon | ||
| Lanai | ||
| MachO | ||
| Markup | ||
| Mips | ||
| PowerPC | ||
| Sparc | ||
| SystemZ | ||
| WebAssembly | ||
| X86 | ||