mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
8ec23cb07e
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181249 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
959 B
LLVM
48 lines
959 B
LLVM
; RUN: opt -instcombine -S < %s | FileCheck %s
|
|
|
|
define i32 @test1(i32 %x) nounwind {
|
|
%and = and i32 %x, 31
|
|
%sub = sub i32 63, %and
|
|
ret i32 %sub
|
|
|
|
; CHECK: @test1
|
|
; CHECK-NEXT: and i32 %x, 31
|
|
; CHECK-NEXT: xor i32 %and, 63
|
|
; CHECK-NEXT: ret
|
|
}
|
|
|
|
declare i32 @llvm.ctlz.i32(i32, i1) nounwind readnone
|
|
|
|
define i32 @test2(i32 %x) nounwind {
|
|
%count = tail call i32 @llvm.ctlz.i32(i32 %x, i1 true) nounwind readnone
|
|
%sub = sub i32 31, %count
|
|
ret i32 %sub
|
|
|
|
; CHECK: @test2
|
|
; CHECK-NEXT: ctlz
|
|
; CHECK-NEXT: xor i32 %count, 31
|
|
; CHECK-NEXT: ret
|
|
}
|
|
|
|
define i32 @test3(i32 %x) nounwind {
|
|
%and = and i32 %x, 31
|
|
%sub = xor i32 31, %and
|
|
%add = add i32 %sub, 42
|
|
ret i32 %add
|
|
|
|
; CHECK: @test3
|
|
; CHECK-NEXT: and i32 %x, 31
|
|
; CHECK-NEXT: sub i32 73, %and
|
|
; CHECK-NEXT: ret
|
|
}
|
|
|
|
define i32 @test4(i32 %x) nounwind {
|
|
%sub = xor i32 %x, 2147483648
|
|
%add = add i32 %sub, 42
|
|
ret i32 %add
|
|
|
|
; CHECK: @test4
|
|
; CHECK-NEXT: add i32 %x, -2147483606
|
|
; CHECK-NEXT: ret
|
|
}
|