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[NFC][InstCombine] rem.ll: add a few commutative tests. 

This closes a gap in missing test coverage in
isKnownToBeAPowerOfTwo() from ValueTracking.cpp

llvm-svn: 330975
This commit is contained in:
Roman Lebedev 2018-04-26 18:44:37 +00:00
parent e117e1a440
commit 3d7b22621c
1 changed files with 54 additions and 0 deletions
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54
llvm/test/Transforms/InstCombine/rem.ll
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@ -386,6 +386,60 @@ define i32 @test19(i32 %x, i32 %y) {
ret i32 %E
}
define i32 @test19_commutative0(i32 %x, i32 %y) {
; CHECK-LABEL: @test19_commutative0(
; CHECK-NEXT: [[A:%.*]] = shl i32 1, [[X:%.*]]
; CHECK-NEXT: [[B:%.*]] = shl i32 1, [[Y:%.*]]
; CHECK-NEXT: [[C:%.*]] = and i32 [[B]], [[A]]
; CHECK-NEXT: [[D:%.*]] = add i32 [[C]], [[A]]
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[D]], -1
; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[Y]]
; CHECK-NEXT: ret i32 [[E]]
;
%A = shl i32 1, %x
%B = shl i32 1, %y
%C = and i32 %B, %A ; swapped
%D = add i32 %C, %A
%E = urem i32 %y, %D
ret i32 %E
}
define i32 @test19_commutative1(i32 %x, i32 %y) {
; CHECK-LABEL: @test19_commutative1(
; CHECK-NEXT: [[A:%.*]] = shl i32 1, [[X:%.*]]
; CHECK-NEXT: [[B:%.*]] = shl i32 1, [[Y:%.*]]
; CHECK-NEXT: [[C:%.*]] = and i32 [[A]], [[B]]
; CHECK-NEXT: [[D:%.*]] = add i32 [[A]], [[C]]
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[D]], -1
; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[Y]]
; CHECK-NEXT: ret i32 [[E]]
;
%A = shl i32 1, %x
%B = shl i32 1, %y
%C = and i32 %A, %B
%D = add i32 %A, %C ; swapped
%E = urem i32 %y, %D
ret i32 %E
}
define i32 @test19_commutative2(i32 %x, i32 %y) {
; CHECK-LABEL: @test19_commutative2(
; CHECK-NEXT: [[A:%.*]] = shl i32 1, [[X:%.*]]
; CHECK-NEXT: [[B:%.*]] = shl i32 1, [[Y:%.*]]
; CHECK-NEXT: [[C:%.*]] = and i32 [[B]], [[A]]
; CHECK-NEXT: [[D:%.*]] = add i32 [[A]], [[C]]
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[D]], -1
; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[Y]]
; CHECK-NEXT: ret i32 [[E]]
;
%A = shl i32 1, %x
%B = shl i32 1, %y
%C = and i32 %B, %A ; swapped
%D = add i32 %A, %C ; swapped
%E = urem i32 %y, %D
ret i32 %E
}
define <2 x i64> @test20(<2 x i64> %X, <2 x i1> %C) {
; CHECK-LABEL: @test20(
; CHECK-NEXT: [[R:%.*]] = select <2 x i1> [[C:%.*]], <2 x i64> <i64 1, i64 2>, <2 x i64> zeroinitializer