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18 lines
410 B
LLVM
18 lines
410 B
LLVM
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; RUN: llc -march=x86-64 < %s | not grep negq
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; These sequences don't need neg instructions; they can be done with
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; a single shift and sub each.
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define i64 @foo(i64 %x, i64 %y, i64 %n) nounwind {
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%a = sub i64 0, %y
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%b = shl i64 %a, %n
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%c = add i64 %b, %x
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ret i64 %c
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}
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define i64 @boo(i64 %x, i64 %y, i64 %n) nounwind {
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%a = sub i64 0, %y
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%b = shl i64 %a, %n
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%c = add i64 %x, %b
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ret i64 %c
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}
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