| ; 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 } |
| |