| Hal Finkel | 7e18449 | 2014-09-07 20:29:59 +0000 | [diff] [blame] | 1 | ; RUN: opt -S -jump-threading -dce < %s | FileCheck %s |
| 2 | target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| 3 | target triple = "x86_64-unknown-linux-gnu" |
| 4 | |
| 5 | ; Function Attrs: nounwind uwtable |
| 6 | define i32 @test1(i32 %a, i32 %b) #0 { |
| 7 | entry: |
| 8 | %cmp = icmp sgt i32 %a, 5 |
| 9 | tail call void @llvm.assume(i1 %cmp) |
| 10 | %cmp1 = icmp sgt i32 %b, 1234 |
| 11 | br i1 %cmp1, label %if.then, label %if.else |
| 12 | |
| 13 | ; CHECK-LABEL: @test1 |
| 14 | ; CHECK: icmp sgt i32 %a, 5 |
| 15 | ; CHECK: call void @llvm.assume |
| 16 | ; CHECK-NOT: icmp sgt i32 %a, 3 |
| 17 | ; CHECK: ret i32 |
| 18 | |
| 19 | if.then: ; preds = %entry |
| 20 | %cmp2 = icmp sgt i32 %a, 3 |
| 21 | br i1 %cmp2, label %if.then3, label %return |
| 22 | |
| 23 | if.then3: ; preds = %if.then |
| David Blaikie | 23af648 | 2015-04-16 23:24:18 +0000 | [diff] [blame] | 24 | tail call void (...) @bar() #1 |
| Hal Finkel | 7e18449 | 2014-09-07 20:29:59 +0000 | [diff] [blame] | 25 | br label %return |
| 26 | |
| 27 | if.else: ; preds = %entry |
| David Blaikie | 23af648 | 2015-04-16 23:24:18 +0000 | [diff] [blame] | 28 | tail call void (...) @car() #1 |
| Hal Finkel | 7e18449 | 2014-09-07 20:29:59 +0000 | [diff] [blame] | 29 | br label %return |
| 30 | |
| 31 | return: ; preds = %if.else, %if.then, %if.then3 |
| 32 | %retval.0 = phi i32 [ 1, %if.then3 ], [ 0, %if.then ], [ 0, %if.else ] |
| 33 | ret i32 %retval.0 |
| 34 | } |
| 35 | |
| 36 | define i32 @test2(i32 %a) #0 { |
| 37 | entry: |
| 38 | %cmp = icmp sgt i32 %a, 5 |
| 39 | tail call void @llvm.assume(i1 %cmp) |
| 40 | %cmp1 = icmp sgt i32 %a, 3 |
| 41 | br i1 %cmp1, label %if.then, label %return |
| 42 | |
| 43 | ; CHECK-LABEL: @test2 |
| 44 | ; CHECK: icmp sgt i32 %a, 5 |
| 45 | ; CHECK: tail call void @llvm.assume |
| David Blaikie | 23af648 | 2015-04-16 23:24:18 +0000 | [diff] [blame] | 46 | ; CHECK: tail call void (...) @bar() |
| Hal Finkel | 7e18449 | 2014-09-07 20:29:59 +0000 | [diff] [blame] | 47 | ; CHECK: ret i32 1 |
| 48 | |
| 49 | |
| 50 | if.then: ; preds = %entry |
| David Blaikie | 23af648 | 2015-04-16 23:24:18 +0000 | [diff] [blame] | 51 | tail call void (...) @bar() #1 |
| Hal Finkel | 7e18449 | 2014-09-07 20:29:59 +0000 | [diff] [blame] | 52 | br label %return |
| 53 | |
| 54 | return: ; preds = %entry, %if.then |
| 55 | %retval.0 = phi i32 [ 1, %if.then ], [ 0, %entry ] |
| 56 | ret i32 %retval.0 |
| 57 | } |
| 58 | |
| 59 | ; Function Attrs: nounwind |
| 60 | declare void @llvm.assume(i1) #1 |
| 61 | |
| 62 | declare void @bar(...) |
| 63 | |
| 64 | declare void @car(...) |
| 65 | |
| 66 | attributes #0 = { nounwind uwtable } |
| 67 | attributes #1 = { nounwind } |
| 68 | |