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ValueTracking: pre-commit udiv/urem recurrence tests #109198

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merged 1 commit into from
Nov 7, 2024
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ValueTracking: pre-commit udiv/urem recurrence tests #109198

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69 changes: 69 additions & 0 deletions llvm/test/Analysis/ValueTracking/recurrence-knownbits.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -81,6 +81,75 @@ exit:
ret i64 %res
}

define i64 @test_udiv(i1 %c) {
; CHECK-LABEL: @test_udiv(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 9, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[IV_NEXT]] = udiv i64 [[IV]], 3
; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: [[RES:%.*]] = and i64 [[IV]], 16
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [9, %entry], [%iv.next, %loop]
%iv.next = udiv i64 %iv, 3
br i1 %c, label %exit, label %loop
exit:
%res = and i64 %iv, 16
ret i64 %res
}

define i64 @test_udiv_neg(i1 %c) {
; CHECK-LABEL: @test_udiv_neg(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 2, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[IV_NEXT]] = udiv i64 9, [[IV]]
; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: [[RES:%.*]] = and i64 [[IV]], 4
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [2, %entry], [%iv.next, %loop]
%iv.next = udiv i64 9, %iv
br i1 %c, label %exit, label %loop
exit:
%res = and i64 %iv, 4
ret i64 %res
}

define i64 @test_urem(i1 %c) {
; CHECK-LABEL: @test_urem(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 3, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[IV_NEXT]] = urem i64 9, [[IV]]
; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: [[RES:%.*]] = and i64 [[IV]], 4
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [3, %entry], [%iv.next, %loop]
%iv.next = urem i64 9, %iv
br i1 %c, label %exit, label %loop
exit:
%res = and i64 %iv, 4
ret i64 %res
}

define i64 @test_and(i1 %c) {
; CHECK-LABEL: @test_and(
; CHECK-NEXT: entry:
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