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[tests] Cover cases we could infer SCEV flags, but don't

This commit is contained in:
Philip Reames 2021-10-05 13:16:10 -07:00
parent 84afd02525
commit 94c1c56cc5
1 changed files with 101 additions and 0 deletions
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101
llvm/test/Analysis/ScalarEvolution/flags-from-poison.ll
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@ -1620,3 +1620,104 @@ cont6: ; preds = %cont1, %if.then
store i32 %3, i32* @b, align 4
br label %for.cond
}
define noundef i32 @add-basic(i32 %a, i32 %b) {
; CHECK-LABEL: 'add-basic'
; CHECK-NEXT: Classifying expressions for: @add-basic
; CHECK-NEXT: %res = add nuw nsw i32 %a, %b
; CHECK-NEXT: --> (%a + %b) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @add-basic
;
%res = add nuw nsw i32 %a, %b
ret i32 %res
}
define noundef i32 @sub-basic(i32 %a, i32 %b) {
; CHECK-LABEL: 'sub-basic'
; CHECK-NEXT: Classifying expressions for: @sub-basic
; CHECK-NEXT: %res = sub nuw nsw i32 %a, %b
; CHECK-NEXT: --> ((-1 * %b) + %a) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @sub-basic
;
%res = sub nuw nsw i32 %a, %b
ret i32 %res
}
define noundef i32 @mul-basic(i32 %a, i32 %b) {
; CHECK-LABEL: 'mul-basic'
; CHECK-NEXT: Classifying expressions for: @mul-basic
; CHECK-NEXT: %res = mul nuw nsw i32 %a, %b
; CHECK-NEXT: --> (%a * %b) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @mul-basic
;
%res = mul nuw nsw i32 %a, %b
ret i32 %res
}
define noundef i32 @add-recurse(i32 %a, i32 %b, i32 %c, i32 %d) {
; CHECK-LABEL: 'add-recurse'
; CHECK-NEXT: Classifying expressions for: @add-recurse
; CHECK-NEXT: %x = add i32 %a, %b
; CHECK-NEXT: --> (%a + %b) U: full-set S: full-set
; CHECK-NEXT: %y = add i32 %c, %d
; CHECK-NEXT: --> (%c + %d) U: full-set S: full-set
; CHECK-NEXT: %res = add nuw i32 %x, %y
; CHECK-NEXT: --> (%a + %b + %c + %d) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @add-recurse
;
%x = add i32 %a, %b
%y = add i32 %c, %d
%res = add nuw i32 %x, %y
ret i32 %res
}
define noundef i32 @sub-recurse(i32 %a, i32 %b, i32 %c, i32 %d) {
; CHECK-LABEL: 'sub-recurse'
; CHECK-NEXT: Classifying expressions for: @sub-recurse
; CHECK-NEXT: %x = add i32 %a, %b
; CHECK-NEXT: --> (%a + %b) U: full-set S: full-set
; CHECK-NEXT: %y = add i32 %c, %d
; CHECK-NEXT: --> (%c + %d) U: full-set S: full-set
; CHECK-NEXT: %res = sub nuw i32 %x, %y
; CHECK-NEXT: --> ((-1 * (%c + %d)) + %a + %b) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @sub-recurse
;
%x = add i32 %a, %b
%y = add i32 %c, %d
%res = sub nuw i32 %x, %y
ret i32 %res
}
define noundef i32 @mul-recurse(i32 %a, i32 %b, i32 %c, i32 %d) {
; CHECK-LABEL: 'mul-recurse'
; CHECK-NEXT: Classifying expressions for: @mul-recurse
; CHECK-NEXT: %x = add i32 %a, %b
; CHECK-NEXT: --> (%a + %b) U: full-set S: full-set
; CHECK-NEXT: %y = add i32 %c, %d
; CHECK-NEXT: --> (%c + %d) U: full-set S: full-set
; CHECK-NEXT: %res = mul nuw i32 %x, %y
; CHECK-NEXT: --> ((%a + %b) * (%c + %d)) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @mul-recurse
;
%x = add i32 %a, %b
%y = add i32 %c, %d
%res = mul nuw i32 %x, %y
ret i32 %res
}
define noundef i32 @udiv-recurse(i32 %a, i32 %b, i32 %c, i32 %d) {
; CHECK-LABEL: 'udiv-recurse'
; CHECK-NEXT: Classifying expressions for: @udiv-recurse
; CHECK-NEXT: %x = add i32 %a, %b
; CHECK-NEXT: --> (%a + %b) U: full-set S: full-set
; CHECK-NEXT: %y = add i32 %c, %d
; CHECK-NEXT: --> (%c + %d) U: full-set S: full-set
; CHECK-NEXT: %res = udiv exact i32 %x, %y
; CHECK-NEXT: --> ((%a + %b) /u (%c + %d)) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @udiv-recurse
;
%x = add i32 %a, %b
%y = add i32 %c, %d
%res = udiv exact i32 %x, %y
ret i32 %res
}