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[ConstraintElim] Add pre-commit tests for PR76299. NFC. #76512

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Merged
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Dec 28, 2023
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[ConstraintElim] Add pre-commit tests for PR76299. NFC. #76512

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40 changes: 40 additions & 0 deletions llvm/test/Transforms/ConstraintElimination/constraint-overflow.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s

define i32 @f(i64 %a3, i64 %numElements) {
; CHECK-LABEL: define i32 @f(
; CHECK-SAME: i64 [[A3:%.*]], i64 [[NUMELEMENTS:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[COND:%.*]] = icmp ule i64 [[NUMELEMENTS]], 1152921504606846975
; CHECK-NEXT: call void @llvm.assume(i1 [[COND]])
; CHECK-NEXT: [[A1:%.*]] = shl nuw i64 [[NUMELEMENTS]], 4
; CHECK-NEXT: br label [[IF_END:%.*]]
; CHECK: if.end:
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i64 [[A1]], [[A3]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_END_I:%.*]], label [[ABORT:%.*]]
; CHECK: if.end.i:
; CHECK-NEXT: [[CMP2_NOT_I:%.*]] = icmp ult i64 [[A1]], [[A3]]
; CHECK-NEXT: br i1 [[CMP2_NOT_I]], label [[ABORT]], label [[EXIT:%.*]]
; CHECK: abort:
; CHECK-NEXT: ret i32 -1
; CHECK: exit:
; CHECK-NEXT: ret i32 0
;
entry:
%cond = icmp ule i64 %numElements, 1152921504606846975
call void @llvm.assume(i1 %cond)
%a1 = shl nuw i64 %numElements, 4
br label %if.end
if.end:
%cmp = icmp ugt i64 %a1, %a3
br i1 %cmp, label %if.end.i, label %abort
if.end.i:
%cmp2.not.i = icmp ult i64 %a1, %a3
br i1 %cmp2.not.i, label %abort, label %exit
abort:
ret i32 -1
exit:
ret i32 0
}

declare void @llvm.assume(i1)