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https://github.com/c64scene-ar/llvm-6502.git
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37bf92b523
if both A op B and A op C simplify. This fires fairly often but doesn't make that much difference. On gcc-as-one-file it removes two "and"s and turns one branch into a select. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122399 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
486 B
LLVM
24 lines
486 B
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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define i32 @foo(i32 %x, i32 %y) {
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; CHECK: @foo
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%add = add nsw i32 %y, %x
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%mul = mul nsw i32 %add, %y
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%square = mul nsw i32 %y, %y
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%res = sub i32 %mul, %square
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ret i32 %res
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; CHECK-NEXT: mul i32 %x, %y
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; CHECK-NEXT: ret i32
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}
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define i1 @bar(i64 %x, i64 %y) {
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; CHECK: @bar
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%a = and i64 %y, %x
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; CHECK: and
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; CHECK-NOT: and
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%not = xor i64 %a, -1
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%b = and i64 %y, %not
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%r = icmp eq i64 %b, 0
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ret i1 %r
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; CHECK: ret i1
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}
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