llvm/test/Transforms/CorrelatedValuePropagation/umax.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -passes=correlated-propagation -S | FileCheck %s

target datalayout = "p:32:32"

define i32 @infer_range_from_dom_equality(i32 %x, i32 %y) {
; CHECK-LABEL: define range(i32 1, 0) i32 @infer_range_from_dom_equality(
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32 [[X]], [[Y]]
; CHECK-NEXT:    [[SUB:%.*]] = sub i32 [[X]], [[Y]]
; CHECK-NEXT:    br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK:       [[IF_THEN]]:
; CHECK-NEXT:    ret i32 1
; CHECK:       [[IF_ELSE]]:
; CHECK-NEXT:    ret i32 [[SUB]]
;
entry:
  %cond = icmp eq i32 %x, %y
  %sub = sub i32 %x, %y
  br i1 %cond, label %if.then, label %if.else

if.then:
  %max1 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max1

if.else:
  %max2 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max2
}

define i32 @infer_range_from_dom_equality_commuted1(i32 %x, i32 %y) {
; CHECK-LABEL: define range(i32 1, 0) i32 @infer_range_from_dom_equality_commuted1(
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32 [[X]], [[Y]]
; CHECK-NEXT:    [[SUB:%.*]] = sub i32 [[Y]], [[X]]
; CHECK-NEXT:    br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK:       [[IF_THEN]]:
; CHECK-NEXT:    ret i32 1
; CHECK:       [[IF_ELSE]]:
; CHECK-NEXT:    ret i32 [[SUB]]
;
entry:
  %cond = icmp eq i32 %x, %y
  %sub = sub i32 %y, %x
  br i1 %cond, label %if.then, label %if.else

if.then:
  %max1 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max1

if.else:
  %max2 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max2
}

define i32 @infer_range_from_dom_equality_commuted2(i32 %x, i32 %y) {
; CHECK-LABEL: define range(i32 1, 0) i32 @infer_range_from_dom_equality_commuted2(
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32 [[Y]], [[X]]
; CHECK-NEXT:    [[SUB:%.*]] = sub i32 [[X]], [[Y]]
; CHECK-NEXT:    br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK:       [[IF_THEN]]:
; CHECK-NEXT:    ret i32 1
; CHECK:       [[IF_ELSE]]:
; CHECK-NEXT:    ret i32 [[SUB]]
;
entry:
  %cond = icmp eq i32 %y, %x
  %sub = sub i32 %x, %y
  br i1 %cond, label %if.then, label %if.else

if.then:
  %max1 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max1

if.else:
  %max2 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max2
}

define i32 @infer_range_from_dom_equality_ptrdiff(ptr %x, ptr %y) {
; CHECK-LABEL: define range(i32 1, 0) i32 @infer_range_from_dom_equality_ptrdiff(
; CHECK-SAME: ptr [[X:%.*]], ptr [[Y:%.*]]) {
; CHECK-NEXT:    [[COND:%.*]] = icmp eq ptr [[X]], [[Y]]
; CHECK-NEXT:    [[XI:%.*]] = ptrtoint ptr [[X]] to i32
; CHECK-NEXT:    [[YI:%.*]] = ptrtoint ptr [[Y]] to i32
; CHECK-NEXT:    [[SUB:%.*]] = sub i32 [[XI]], [[YI]]
; CHECK-NEXT:    br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK:       [[IF_THEN]]:
; CHECK-NEXT:    ret i32 1
; CHECK:       [[IF_ELSE]]:
; CHECK-NEXT:    ret i32 [[SUB]]
;
  %cond = icmp eq ptr %x, %y
  %xi = ptrtoint ptr %x to i32
  %yi = ptrtoint ptr %y to i32
  %sub = sub i32 %xi, %yi
  br i1 %cond, label %if.then, label %if.else

if.then:
  %max1 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max1

if.else:
  %max2 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max2
}

; Negative tests

define i32 @infer_range_from_dom_slt(i32 %x, i32 %y) {
; CHECK-LABEL: define range(i32 1, 0) i32 @infer_range_from_dom_slt(
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[COND:%.*]] = icmp slt i32 [[X]], [[Y]]
; CHECK-NEXT:    [[SUB:%.*]] = sub i32 [[X]], [[Y]]
; CHECK-NEXT:    br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK:       [[IF_THEN]]:
; CHECK-NEXT:    [[MAX1:%.*]] = call i32 @llvm.umax.i32(i32 [[SUB]], i32 1)
; CHECK-NEXT:    ret i32 [[MAX1]]
; CHECK:       [[IF_ELSE]]:
; CHECK-NEXT:    [[MAX2:%.*]] = call i32 @llvm.umax.i32(i32 [[SUB]], i32 1)
; CHECK-NEXT:    ret i32 [[MAX2]]
;
entry:
  %cond = icmp slt i32 %x, %y
  %sub = sub i32 %x, %y
  br i1 %cond, label %if.then, label %if.else

if.then:
  %max1 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max1

if.else:
  %max2 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max2
}

define i32 @infer_range_from_dom_equality_not_match(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: define range(i32 1, 0) i32 @infer_range_from_dom_equality_not_match(
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]], i32 [[Z:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32 [[X]], [[Z]]
; CHECK-NEXT:    [[SUB:%.*]] = sub i32 [[X]], [[Y]]
; CHECK-NEXT:    br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK:       [[IF_THEN]]:
; CHECK-NEXT:    [[MAX1:%.*]] = call i32 @llvm.umax.i32(i32 [[SUB]], i32 1)
; CHECK-NEXT:    ret i32 [[MAX1]]
; CHECK:       [[IF_ELSE]]:
; CHECK-NEXT:    [[MAX2:%.*]] = call i32 @llvm.umax.i32(i32 [[SUB]], i32 1)
; CHECK-NEXT:    ret i32 [[MAX2]]
;
entry:
  %cond = icmp eq i32 %x, %z
  %sub = sub i32 %x, %y
  br i1 %cond, label %if.then, label %if.else

if.then:
  %max1 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max1

if.else:
  %max2 = call i32 @llvm.umax.i32(i32 %sub, i32 1)
  ret i32 %max2
}