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[InstCombine] add baseline test for (X * C2) << C1 --> X * (C2 << C1) without one use; NFC

This commit is contained in:
chenglin.bi 2022-04-22 00:12:06 +08:00
parent af3fb07154
commit e077e3a648
1 changed files with 15 additions and 0 deletions
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15
llvm/test/Transforms/InstCombine/apint-shift.ll
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@ -23,6 +23,21 @@ define i55 @test6a(i55 %A) {
ret i55 %C ret i55 %C
} }
declare void @use(i55 %0)
define i55 @test6a_negative_oneuse(i55 %A) {
; CHECK-LABEL: @test6a_negative_oneuse(
; CHECK-NEXT: [[B:%.*]] = mul i55 [[A:%.*]], 3
; CHECK-NEXT: [[C:%.*]] = mul i55 [[A]], 6
; CHECK-NEXT: call void @use(i55 [[B]])
; CHECK-NEXT: ret i55 [[C]]
;
%B = mul i55 %A, 3
%C = shl i55 %B, 1
call void @use(i55 %B)
ret i55 %C
}
; (X * C2) << C1 --> X * (C2 << C1) ; (X * C2) << C1 --> X * (C2 << C1)
define <2 x i55> @test6a_vec(<2 x i55> %A) { define <2 x i55> @test6a_vec(<2 x i55> %A) {