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Diffstat (limited to 'test/Transforms/InstCombine/distribute.ll')
-rw-r--r-- | test/Transforms/InstCombine/distribute.ll | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/distribute.ll b/test/Transforms/InstCombine/distribute.ll new file mode 100644 index 0000000..e6360f8 --- /dev/null +++ b/test/Transforms/InstCombine/distribute.ll @@ -0,0 +1,68 @@ +; 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( +; 3*X - 2*X -> 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 +} |