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x64: improve generation of i128 icmp (#3946)

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Previously, we used the flags of `AND` for `SETcc`. This change uses
`TEST` instead, which discards the AND result but sets the flags needed
for `SETcc`. This reduces register pressure slightly for this sequence.
This commit is contained in:
Andrew Brown
2022-03-18 16:36:31 -07:00
committed by GitHub
parent 41594dc5d9
commit 5fa104205d
4 changed files with 131 additions and 134 deletions
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cranelift/codegen/src/isa/x64/lower/isle/generated_code.manifest
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@@ -1,4 +1,4 @@
src/clif.isle 9ea75a6f790b5c03
src/prelude.isle b2bc986bcbbbb77
src/isa/x64/inst.isle 5644ccb29bff0b51
src/isa/x64/lower.isle 51d6ce13a3e47bc4
src/isa/x64/lower.isle 4c4b772e7f9e958a