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https://github.com/c64scene-ar/llvm-6502.git
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4604fc7791
For completeness - not spotted in the wild. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143211 91177308-0d34-0410-b5e6-96231b3b80d8
23 lines
434 B
LLVM
23 lines
434 B
LLVM
; RUN: opt < %s -instsimplify -S | FileCheck %s
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define i64 @pow2(i32 %x) {
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; CHECK: @pow2
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%negx = sub i32 0, %x
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%x2 = and i32 %x, %negx
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%e = zext i32 %x2 to i64
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%nege = sub i64 0, %e
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%e2 = and i64 %e, %nege
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ret i64 %e2
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; CHECK: ret i64 %e
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}
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define i64 @pow2b(i32 %x) {
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; CHECK: @pow2b
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%sh = shl i32 2, %x
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%e = zext i32 %sh to i64
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%nege = sub i64 0, %e
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%e2 = and i64 %e, %nege
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ret i64 %e2
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; CHECK: ret i64 %e
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}
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