; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=aggressive-instcombine -S | FileCheck %s

declare i32 @strcmp(ptr, ptr)

@s0 = constant [1 x i8] c"\00"
@s1 = constant [2 x i8] c"0\00"
@s2 = constant [3 x i8] c"01\00"
@s3 = constant [4 x i8] c"012\00"
@s4 = constant [5 x i8] c"0123\00"

; Expand strcmp(C, "x"), strcmp(C, "xy").

define i1 @expand_strcmp_s0(ptr %C) {
; CHECK-LABEL: @expand_strcmp_s0(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s0)
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s0)
  %cmp = icmp eq i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_eq_s1(ptr %C) {
; CHECK-LABEL: @expand_strcmp_eq_s1(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s1)
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s1)
  %cmp = icmp eq i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_eq_s1_commuted(ptr %C) {
; CHECK-LABEL: @expand_strcmp_eq_s1_commuted(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr @s1, ptr [[C:%.*]])
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr @s1, ptr %C)
  %cmp = icmp eq i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_ne_s1(ptr %C) {
; CHECK-LABEL: @expand_strcmp_ne_s1(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s1)
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s1)
  %cmp = icmp ne i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_sgt_s1(ptr %C) {
; CHECK-LABEL: @expand_strcmp_sgt_s1(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s1)
; CHECK-NEXT:    [[CMP:%.*]] = icmp sgt i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s1)
  %cmp = icmp sgt i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_sge_s1(ptr %C) {
; CHECK-LABEL: @expand_strcmp_sge_s1(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s1)
; CHECK-NEXT:    [[CMP:%.*]] = icmp sge i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s1)
  %cmp = icmp sge i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_slt_s1(ptr %C) {
; CHECK-LABEL: @expand_strcmp_slt_s1(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s1)
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s1)
  %cmp = icmp slt i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_sle_s1(ptr %C) {
; CHECK-LABEL: @expand_strcmp_sle_s1(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s1)
; CHECK-NEXT:    [[CMP:%.*]] = icmp sle i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s1)
  %cmp = icmp sle i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_s1_fail_1(ptr %C) {
; CHECK-LABEL: @expand_strcmp_s1_fail_1(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s1)
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 1
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s1)
  %cmp = icmp eq i32 %call, 1
  ret i1 %cmp
}

define i1 @expand_strcmp_s1_fail_2(ptr %C) {
; CHECK-LABEL: @expand_strcmp_s1_fail_2(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr @s1, ptr @s1)
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr @s1, ptr @s1)
  %cmp = icmp eq i32 %call, 0
  ret i1 %cmp
}

define i32 @expand_strcmp_s1_fail_3(ptr %C) {
; CHECK-LABEL: @expand_strcmp_s1_fail_3(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s1)
; CHECK-NEXT:    ret i32 [[CALL]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s1)
  ret i32 %call
}

define i1 @expand_strcmp_eq_s2(ptr %C) {
; CHECK-LABEL: @expand_strcmp_eq_s2(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s2)
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s2)
  %cmp = icmp eq i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_ne_s2(ptr %C) {
; CHECK-LABEL: @expand_strcmp_ne_s2(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s2)
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s2)
  %cmp = icmp ne i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_sgt_s2(ptr %C) {
; CHECK-LABEL: @expand_strcmp_sgt_s2(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s2)
; CHECK-NEXT:    [[CMP:%.*]] = icmp sgt i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s2)
  %cmp = icmp sgt i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_sge_s2(ptr %C) {
; CHECK-LABEL: @expand_strcmp_sge_s2(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s2)
; CHECK-NEXT:    [[CMP:%.*]] = icmp sge i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s2)
  %cmp = icmp sge i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_slt_s2(ptr %C) {
; CHECK-LABEL: @expand_strcmp_slt_s2(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s2)
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s2)
  %cmp = icmp slt i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_sle_s2(ptr %C) {
; CHECK-LABEL: @expand_strcmp_sle_s2(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s2)
; CHECK-NEXT:    [[CMP:%.*]] = icmp sle i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s2)
  %cmp = icmp sle i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_s3(ptr %C) {
; CHECK-LABEL: @expand_strcmp_s3(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s3)
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s3)
  %cmp = icmp eq i32 %call, 0
  ret i1 %cmp
}

define i1 @expand_strcmp_s4(ptr %C) {
; CHECK-LABEL: @expand_strcmp_s4(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @strcmp(ptr [[C:%.*]], ptr @s4)
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %call = call i32 @strcmp(ptr %C, ptr @s4)
  %cmp = icmp eq i32 %call, 0
  ret i1 %cmp
}