llvm/test/Transforms/InstCombine/assume2.ll

; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: nounwind
declare void @llvm.assume(i1) #1

; Function Attrs: nounwind uwtable
define i32 @test1(i32 %a) #0 {
entry:
; CHECK-LABEL: @test1
; CHECK: call void @llvm.assume
; CHECK: ret i32 5

  %and = and i32 %a, 15
  %cmp = icmp eq i32 %and, 5
  tail call void @llvm.assume(i1 %cmp)

  %and1 = and i32 %a, 7
  ret i32 %and1
}

; Function Attrs: nounwind uwtable
define i32 @test2(i32 %a) #0 {
entry:
; CHECK-LABEL: @test2
; CHECK: call void @llvm.assume
; CHECK: ret i32 2

  %and = and i32 %a, 15
  %nand = xor i32 %and, -1
  %cmp = icmp eq i32 %nand, 4294967285
  tail call void @llvm.assume(i1 %cmp)

  %and1 = and i32 %a, 7
  ret i32 %and1
}

; Function Attrs: nounwind uwtable
define i32 @test3(i32 %a) #0 {
entry:
; CHECK-LABEL: @test3
; CHECK: call void @llvm.assume
; CHECK: ret i32 5

  %v = or i32 %a, 4294967280
  %cmp = icmp eq i32 %v, 4294967285
  tail call void @llvm.assume(i1 %cmp)

  %and1 = and i32 %a, 7
  ret i32 %and1
}

; Function Attrs: nounwind uwtable
define i32 @test4(i32 %a) #0 {
entry:
; CHECK-LABEL: @test4
; CHECK: call void @llvm.assume
; CHECK: ret i32 2

  %v = or i32 %a, 4294967280
  %nv = xor i32 %v, -1
  %cmp = icmp eq i32 %nv, 5
  tail call void @llvm.assume(i1 %cmp)

  %and1 = and i32 %a, 7
  ret i32 %and1
}

; Function Attrs: nounwind uwtable
define i32 @test5(i32 %a) #0 {
entry:
; CHECK-LABEL: @test5
; CHECK: call void @llvm.assume
; CHECK: ret i32 4

  %v = xor i32 %a, 1
  %cmp = icmp eq i32 %v, 5
  tail call void @llvm.assume(i1 %cmp)

  %and1 = and i32 %a, 7
  ret i32 %and1
}

; Function Attrs: nounwind uwtable
define i32 @test6(i32 %a) #0 {
entry:
; CHECK-LABEL: @test6
; CHECK: call void @llvm.assume
; CHECK: ret i32 5

  %v = shl i32 %a, 2
  %cmp = icmp eq i32 %v, 20
  tail call void @llvm.assume(i1 %cmp)

  %and1 = and i32 %a, 63
  ret i32 %and1
}

; Function Attrs: nounwind uwtable
define i32 @test7(i32 %a) #0 {
entry:
; CHECK-LABEL: @test7
; CHECK: call void @llvm.assume
; CHECK: ret i32 20

  %v = lshr i32 %a, 2
  %cmp = icmp eq i32 %v, 5
  tail call void @llvm.assume(i1 %cmp)

  %and1 = and i32 %a, 252
  ret i32 %and1
}

; Function Attrs: nounwind uwtable
define i32 @test8(i32 %a) #0 {
entry:
; CHECK-LABEL: @test8
; CHECK: call void @llvm.assume
; CHECK: ret i32 20

  %v = lshr i32 %a, 2
  %cmp = icmp eq i32 %v, 5
  tail call void @llvm.assume(i1 %cmp)

  %and1 = and i32 %a, 252
  ret i32 %and1
}

; Function Attrs: nounwind uwtable
define i32 @test9(i32 %a) #0 {
entry:
; CHECK-LABEL: @test9
; CHECK: call void @llvm.assume
; CHECK: ret i32 0

  %cmp = icmp sgt i32 %a, 5
  tail call void @llvm.assume(i1 %cmp)

  %and1 = and i32 %a, 2147483648
  ret i32 %and1
}

; Function Attrs: nounwind uwtable
define i32 @test10(i32 %a) #0 {
entry:
; CHECK-LABEL: @test10
; CHECK: call void @llvm.assume
; CHECK: ret i32 -2147483648

  %cmp = icmp sle i32 %a, -2
  tail call void @llvm.assume(i1 %cmp)

  %and1 = and i32 %a, 2147483648
  ret i32 %and1
}

; Function Attrs: nounwind uwtable
define i32 @test11(i32 %a) #0 {
entry:
; CHECK-LABEL: @test11
; CHECK: call void @llvm.assume
; CHECK: ret i32 0

  %cmp = icmp ule i32 %a, 256
  tail call void @llvm.assume(i1 %cmp)

  %and1 = and i32 %a, 3072
  ret i32 %and1
}

attributes #0 = { nounwind uwtable }
attributes #1 = { nounwind }