xref: /llvm-project/llvm/test/Transforms/ConstraintElimination/sext-signed-predicates.ll (revision 4e9fe860d2dd462e514586a3b90ad373dc07b797)

; 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 i1 @cmp_sext(i32 %a, i32 %b){
; CHECK-LABEL: define i1 @cmp_sext(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[A]], [[B]]
; CHECK-NEXT:    br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[SA:%.*]] = sext i32 [[A]] to i64
; CHECK-NEXT:    [[SB:%.*]] = sext i32 [[B]] to i64
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i64 [[SA]], 1
; CHECK-NEXT:    ret i1 true
; CHECK:       else:
; CHECK-NEXT:    ret i1 false
;
entry:
  %cmp = icmp slt i32 %a, %b
  br i1 %cmp, label %then, label %else

then:
  %sa = sext i32 %a to i64
  %sb = sext i32 %b to i64
  %add = add nsw i64 %sa, 1
  %cmp2 = icmp sge i64 %sb, %add
  ret i1 %cmp2

else:
  ret i1 false
}

define i1 @cmp_sext_add(i32 %a, i32 %b){
; CHECK-LABEL: define i1 @cmp_sext_add(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[A]], [[B]]
; CHECK-NEXT:    br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[A1:%.*]] = add nsw i32 [[A]], 1
; CHECK-NEXT:    [[B1:%.*]] = add nsw i32 [[B]], 1
; CHECK-NEXT:    [[SA:%.*]] = sext i32 [[A1]] to i64
; CHECK-NEXT:    [[SB:%.*]] = sext i32 [[B1]] to i64
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i64 [[SA]], 1
; CHECK-NEXT:    ret i1 true
; CHECK:       else:
; CHECK-NEXT:    ret i1 false
;
entry:
  %cmp = icmp slt i32 %a, %b
  br i1 %cmp, label %then, label %else

then:
  %a1 = add nsw i32 %a, 1
  %b1 = add nsw i32 %b, 1
  %sa = sext i32 %a1 to i64
  %sb = sext i32 %b1 to i64
  %add = add nsw i64 %sa, 1
  %cmp2 = icmp sge i64 %sb, %add
  ret i1 %cmp2

else:
  ret i1 false
}

define i1 @cmp_sext_dynamic_increment(i32 %a, i32 %b, i64 %c){
; CHECK-LABEL: define i1 @cmp_sext_dynamic_increment(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]], i64 [[C:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[POS:%.*]] = icmp slt i64 [[C]], 2
; CHECK-NEXT:    call void @llvm.assume(i1 [[POS]])
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[A]], [[B]]
; CHECK-NEXT:    br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[SA:%.*]] = sext i32 [[A]] to i64
; CHECK-NEXT:    [[SB:%.*]] = sext i32 [[B]] to i64
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i64 [[SA]], [[C]]
; CHECK-NEXT:    ret i1 true
; CHECK:       else:
; CHECK-NEXT:    ret i1 false
;
entry:
  %pos = icmp slt i64 %c, 2
  call void @llvm.assume(i1 %pos)
  %cmp = icmp slt i32 %a, %b
  br i1 %cmp, label %then, label %else

then:
  %sa = sext i32 %a to i64
  %sb = sext i32 %b to i64
  %add = add nsw i64 %sa, %c
  %cmp2 = icmp sge i64 %sb, %add
  ret i1 %cmp2

else:
  ret i1 false
}

define i1 @cmp_zext_nneg(i32 %a, i32 %b){
; CHECK-LABEL: define i1 @cmp_zext_nneg(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[A]], [[B]]
; CHECK-NEXT:    br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[SA:%.*]] = zext nneg i32 [[A]] to i64
; CHECK-NEXT:    [[SB:%.*]] = zext nneg i32 [[B]] to i64
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i64 [[SA]], 1
; CHECK-NEXT:    ret i1 true
; CHECK:       else:
; CHECK-NEXT:    ret i1 false
;
entry:
  %cmp = icmp slt i32 %a, %b
  br i1 %cmp, label %then, label %else

then:
  %sa = zext nneg i32 %a to i64
  %sb = zext nneg i32 %b to i64
  %add = add nsw i64 %sa, 1
  %cmp2 = icmp sge i64 %sb, %add
  ret i1 %cmp2

else:
  ret i1 false
}

; Negative tests

define i1 @cmp_zext(i32 %a, i32 %b){
; CHECK-LABEL: define i1 @cmp_zext(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[A]], [[B]]
; CHECK-NEXT:    br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[SA:%.*]] = zext i32 [[A]] to i64
; CHECK-NEXT:    [[SB:%.*]] = zext i32 [[B]] to i64
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i64 [[SA]], 1
; CHECK-NEXT:    [[CMP2:%.*]] = icmp sge i64 [[SB]], [[ADD]]
; CHECK-NEXT:    ret i1 [[CMP2]]
; CHECK:       else:
; CHECK-NEXT:    ret i1 false
;
entry:
  %cmp = icmp slt i32 %a, %b
  br i1 %cmp, label %then, label %else

then:
  %sa = zext i32 %a to i64
  %sb = zext i32 %b to i64
  %add = add nsw i64 %sa, 1
  %cmp2 = icmp sge i64 %sb, %add
  ret i1 %cmp2

else:
  ret i1 false
}

define i1 @cmp_sext_unknown_increment(i32 %a, i32 %b, i64 %c){
; CHECK-LABEL: define i1 @cmp_sext_unknown_increment(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]], i64 [[C:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[A]], [[B]]
; CHECK-NEXT:    br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[SA:%.*]] = sext i32 [[A]] to i64
; CHECK-NEXT:    [[SB:%.*]] = sext i32 [[B]] to i64
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i64 [[SA]], [[C]]
; CHECK-NEXT:    [[CMP2:%.*]] = icmp sge i64 [[SB]], [[ADD]]
; CHECK-NEXT:    ret i1 [[CMP2]]
; CHECK:       else:
; CHECK-NEXT:    ret i1 false
;
entry:
  %cmp = icmp slt i32 %a, %b
  br i1 %cmp, label %then, label %else

then:
  %sa = sext i32 %a to i64
  %sb = sext i32 %b to i64
  %add = add nsw i64 %sa, %c
  %cmp2 = icmp sge i64 %sb, %add
  ret i1 %cmp2

else:
  ret i1 false
}

define i1 @cmp_sext_sgt(i32 %a, i32 %b){
; CHECK-LABEL: define i1 @cmp_sext_sgt(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[A]], [[B]]
; CHECK-NEXT:    br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[SA:%.*]] = sext i32 [[A]] to i64
; CHECK-NEXT:    [[SB:%.*]] = sext i32 [[B]] to i64
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i64 [[SA]], 1
; CHECK-NEXT:    [[CMP2:%.*]] = icmp sgt i64 [[SB]], [[ADD]]
; CHECK-NEXT:    ret i1 [[CMP2]]
; CHECK:       else:
; CHECK-NEXT:    ret i1 false
;
entry:
  %cmp = icmp slt i32 %a, %b
  br i1 %cmp, label %then, label %else

then:
  %sa = sext i32 %a to i64
  %sb = sext i32 %b to i64
  %add = add nsw i64 %sa, 1
  %cmp2 = icmp sgt i64 %sb, %add
  ret i1 %cmp2

else:
  ret i1 false
}

declare void @use(i1)

define void @sge_sext(i16 %x, i32 %y) {
; CHECK-LABEL: define void @sge_sext(
; CHECK-SAME: i16 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[X_EXT:%.*]] = sext i16 [[X]] to i32
; CHECK-NEXT:    [[C_1:%.*]] = icmp sge i32 [[X_EXT]], [[Y]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp sge i32 [[Y]], -10
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK:       bb1:
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[T_3:%.*]] = icmp sge i32 [[X_EXT]], -9
; CHECK-NEXT:    call void @use(i1 [[T_3]])
; CHECK-NEXT:    [[C_3:%.*]] = icmp sge i32 [[X_EXT]], -9
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    [[C_4:%.*]] = icmp sge i32 [[Y]], [[X_EXT]]
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[C_5:%.*]] = icmp sge i16 [[X]], -9
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    ret void
; CHECK:       bb2:
; CHECK-NEXT:    ret void
;
entry:
  %x.ext = sext i16 %x to i32
  %c.1 = icmp sge i32 %x.ext, %y
  %c.2 = icmp sge i32 %y, -10
  %and = and i1 %c.1, %c.2
  br i1 %and, label %bb1, label %bb2

bb1:
  %t.1 = icmp sge i32 %x.ext, %y
  call void @use(i1 %t.1)
  %t.2 = icmp sge i16 %x, -10
  call void @use(i1 %t.2)
  %t.3 = icmp sge i32 %x.ext, -9
  call void @use(i1 %t.3)
  %c.3 = icmp sge i32 %x.ext, -9
  call void @use(i1 %c.3)
  %c.4 = icmp sge i32 %y, %x.ext
  call void @use(i1 %c.4)
  %c.5 = icmp sge i16 %x, -9
  call void @use(i1 %c.5)
  ret void

bb2:
  ret void
}