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Merged
merged 1 commit into from
Sep 17, 2024
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ValueTracking/test: increase recurrence coverage #108836

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100 changes: 100 additions & 0 deletions ...lueTracking/shift-recurrence-knownbits.ll → ...sis/ValueTracking/recurrence-knownbits.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,106 @@ exit:
ret i64 %res
}

define i64 @test_add(i1 %c) {
; CHECK-LABEL: @test_add(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret i64 0
;
entry:
br label %loop
loop:
%iv = phi i64 [8, %entry], [%iv.next, %loop]
%iv.next = add nuw i64 %iv, 4
br i1 %c, label %exit, label %loop
exit:
%res = and i64 %iv, 1
ret i64 %res
}

define i64 @test_sub(i1 %c) {
; CHECK-LABEL: @test_sub(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret i64 0
;
entry:
br label %loop
loop:
%iv = phi i64 [8, %entry], [%iv.next, %loop]
%iv.next = sub nuw i64 %iv, 4
br i1 %c, label %exit, label %loop
exit:
%res = and i64 %iv, 1
ret i64 %res
}

define i64 @test_mul(i1 %c) {
; CHECK-LABEL: @test_mul(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret i64 0
;
entry:
br label %loop
loop:
%iv = phi i64 [8, %entry], [%iv.next, %loop]
%iv.next = mul i64 %iv, 2
br i1 %c, label %exit, label %loop
exit:
%res = and i64 %iv, 2
ret i64 %res
}

define i64 @test_and(i1 %c) {
; CHECK-LABEL: @test_and(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret i64 2047
;
entry:
br label %loop
loop:
%iv = phi i64 [1025, %entry], [%iv.next, %loop]
%iv.next = and i64 %iv, 1024
br i1 %c, label %exit, label %loop
exit:
%res = or i64 %iv, 1023
ret i64 %res
}

define i64 @test_or(i1 %c) {
; CHECK-LABEL: @test_or(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret i64 2047
;
entry:
br label %loop
loop:
%iv = phi i64 [1025, %entry], [%iv.next, %loop]
%iv.next = or i64 %iv, 1024
br i1 %c, label %exit, label %loop
exit:
%res = or i64 %iv, 1023
ret i64 %res
}

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