Differential D4253 Diff 10881 llvm/trunk/test/Transforms/InstCombine/distribute.ll

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				; RUN: opt < %s -instcombine -S \| FileCheck %s

				define i32 @factorize(i32 %x, i32 %y) {
				; CHECK-LABEL: @factorize(
				; (X \| 1) & (X \| 2) -> X \| (1 & 2) -> X
				%l = or i32 %x, 1
				%r = or i32 %x, 2
				%z = and i32 %l, %r
				ret i32 %z
				; CHECK: ret i32 %x
				}

				define i32 @factorize2(i32 %x) {
				; CHECK-LABEL: @factorize2(
				; 3X - 2X -> X
				%l = mul i32 3, %x
				%r = mul i32 2, %x
				%z = sub i32 %l, %r
				ret i32 %z
				; CHECK: ret i32 %x
				}

				define i32 @factorize3(i32 %x, i32 %a, i32 %b) {
				; CHECK-LABEL: @factorize3(
				; (X \| (A\|B)) & (X \| B) -> X \| ((A\|B) & B) -> X \| B
				%aORb = or i32 %a, %b
				%l = or i32 %x, %aORb
				%r = or i32 %x, %b
				%z = and i32 %l, %r
				ret i32 %z
				; CHECK: %z = or i32 %b, %x
				; CHECK: ret i32 %z
				}

				define i32 @factorize4(i32 %x, i32 %y) {
				; CHECK-LABEL: @factorize4(
				; ((Y << 1) * X) - (X * Y) -> (X * (Y * 2 - Y)) -> (X * Y)
				%sh = shl i32 %y, 1
				%ml = mul i32 %sh, %x
				%mr = mul i32 %x, %y
				%s = sub i32 %ml, %mr
				ret i32 %s
				; CHECK: %s = mul i32 %y, %x
				; CHECK: ret i32 %s
				}

				define i32 @factorize5(i32 %x, i32 %y) {
				; CHECK-LABEL: @factorize5(
				; ((Y * 2) * X) - (X * Y) -> (X * Y)
				%sh = mul i32 %y, 2
				%ml = mul i32 %sh, %x
				%mr = mul i32 %x, %y
				%s = sub i32 %ml, %mr
				ret i32 %s
				; CHECK: %s = mul i32 %y, %x
				; CHECK: ret i32 %s
				}

				define i32 @expand(i32 %x) {
				; CHECK-LABEL: @expand(
				; ((X & 1) \| 2) & 1 -> ((X & 1) & 1) \| (2 & 1) -> (X & 1) \| 0 -> X & 1
				%a = and i32 %x, 1
				%b = or i32 %a, 2
				%c = and i32 %b, 1
				ret i32 %c
				; CHECK: %a = and i32 %x, 1
				; CHECK: ret i32 %a
				}