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[tests] Add coverage for different forms of X - urem X, Y

This commit is contained in:
Philip Reames 2021-11-16 09:23:41 -08:00
parent 56ae2cfecf
commit 3dd6d5b628
1 changed files with 42 additions and 0 deletions
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42
llvm/test/Analysis/ScalarEvolution/urem-0.ll
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@ -44,3 +44,45 @@ define i8 @qux(i8 %a) {
%t3 = urem i8 %a, 2
ret i8 %t3
}
define i32 @test_and_not(i32 %arg) {
; CHECK-LABEL: 'test_and_not'
; CHECK-NEXT: Classifying expressions for: @test_and_not
; CHECK-NEXT: %andn = and i32 %arg, -8
; CHECK-NEXT: --> (8 * (%arg /u 8))<nuw> U: [0,-7) S: [-2147483648,2147483641)
; CHECK-NEXT: Determining loop execution counts for: @test_and_not
;
%andn = and i32 %arg, -8
ret i32 %andn
}
define i32 @test_sub_urem(i32 %arg) {
; CHECK-LABEL: 'test_sub_urem'
; CHECK-NEXT: Classifying expressions for: @test_sub_urem
; CHECK-NEXT: %urem = urem i32 %arg, 8
; CHECK-NEXT: --> (zext i3 (trunc i32 %arg to i3) to i32) U: [0,8) S: [0,8)
; CHECK-NEXT: %sub = sub i32 %arg, %urem
; CHECK-NEXT: --> ((-1 * (zext i3 (trunc i32 %arg to i3) to i32))<nsw> + %arg) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @test_sub_urem
;
%urem = urem i32 %arg, 8
%sub = sub i32 %arg, %urem
ret i32 %sub
}
define i32 @test_trunc_zext(i32 %arg) {
; CHECK-LABEL: 'test_trunc_zext'
; CHECK-NEXT: Classifying expressions for: @test_trunc_zext
; CHECK-NEXT: %trunc = trunc i32 %arg to i3
; CHECK-NEXT: --> (trunc i32 %arg to i3) U: full-set S: full-set
; CHECK-NEXT: %zext = zext i3 %trunc to i32
; CHECK-NEXT: --> (zext i3 (trunc i32 %arg to i3) to i32) U: [0,8) S: [0,8)
; CHECK-NEXT: %sub = sub i32 %arg, %zext
; CHECK-NEXT: --> ((-1 * (zext i3 (trunc i32 %arg to i3) to i32))<nsw> + %arg) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @test_trunc_zext
;
%trunc = trunc i32 %arg to i3
%zext = zext i3 %trunc to i32
%sub = sub i32 %arg, %zext
ret i32 %sub
}