File: 2010-01-28-NegativeSRem.ll

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llvm-toolchain-19 1%3A19.1.7-3
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
; PR6165

define i32 @f() {
; CHECK-LABEL: @f(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[BB1:%.*]]
; CHECK:       BB1:
; CHECK-NEXT:    [[X:%.*]] = phi i32 [ -29, [[ENTRY:%.*]] ], [ 0, [[BB1]] ]
; CHECK-NEXT:    [[REM:%.*]] = srem i32 [[X]], 2
; CHECK-NEXT:    [[T:%.*]] = icmp eq i32 [[REM]], -1
; CHECK-NEXT:    br i1 [[T]], label [[BB2:%.*]], label [[BB1]]
; CHECK:       BB2:
; CHECK-NEXT:    ret i32 [[X]]
;
entry:
  br label %BB1

BB1:                                              ; preds = %BB1, %entry
  %x = phi i32 [ -29, %entry ], [ 0, %BB1 ]       ; <i32> [#uses=2]
  %rem = srem i32 %x, 2                           ; <i32> [#uses=1]
  %t = icmp eq i32 %rem, -1                       ; <i1> [#uses=1]
  br i1 %t, label %BB2, label %BB1

BB2:                                              ; preds = %BB1
  ret i32 %x
}