| ; RUN: opt -S -jump-threading -dce < %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 uwtable |
| define i32 @test1(i32 %a, i32 %b) #0 { |
| entry: |
| %cmp = icmp sgt i32 %a, 5 |
| tail call void @llvm.assume(i1 %cmp) |
| %cmp1 = icmp sgt i32 %b, 1234 |
| br i1 %cmp1, label %if.then, label %if.else |
| |
| ; CHECK-LABEL: @test1 |
| ; CHECK: icmp sgt i32 %a, 5 |
| ; CHECK: call void @llvm.assume |
| ; CHECK-NOT: icmp sgt i32 %a, 3 |
| ; CHECK: ret i32 |
| |
| if.then: ; preds = %entry |
| %cmp2 = icmp sgt i32 %a, 3 |
| br i1 %cmp2, label %if.then3, label %return |
| |
| if.then3: ; preds = %if.then |
| tail call void (...) @bar() #1 |
| br label %return |
| |
| if.else: ; preds = %entry |
| tail call void (...) @car() #1 |
| br label %return |
| |
| return: ; preds = %if.else, %if.then, %if.then3 |
| %retval.0 = phi i32 [ 1, %if.then3 ], [ 0, %if.then ], [ 0, %if.else ] |
| ret i32 %retval.0 |
| } |
| |
| define i32 @test2(i32 %a) #0 { |
| entry: |
| %cmp = icmp sgt i32 %a, 5 |
| tail call void @llvm.assume(i1 %cmp) |
| %cmp1 = icmp sgt i32 %a, 3 |
| br i1 %cmp1, label %if.then, label %return |
| |
| ; CHECK-LABEL: @test2 |
| ; CHECK: icmp sgt i32 %a, 5 |
| ; CHECK: tail call void @llvm.assume |
| ; CHECK: tail call void (...) @bar() |
| ; CHECK: ret i32 1 |
| |
| |
| if.then: ; preds = %entry |
| tail call void (...) @bar() #1 |
| br label %return |
| |
| return: ; preds = %entry, %if.then |
| %retval.0 = phi i32 [ 1, %if.then ], [ 0, %entry ] |
| ret i32 %retval.0 |
| } |
| |
| ; Function Attrs: nounwind |
| declare void @llvm.assume(i1) #1 |
| |
| declare void @bar(...) |
| |
| declare void @car(...) |
| |
| attributes #0 = { nounwind uwtable } |
| attributes #1 = { nounwind } |
| |
