| Frits van Bommel | d9df6ea | 2010-12-06 23:36:56 +0000 | [diff] [blame] | 1 | ; RUN: opt -S < %s -jump-threading | FileCheck %s |
| 2 | |
| 3 | ; Keep block addresses alive. |
| 4 | @addresses = constant [4 x i8*] [ |
| 5 | i8* blockaddress(@test1, %L1), i8* blockaddress(@test1, %L2), |
| 6 | i8* blockaddress(@test2, %L1), i8* blockaddress(@test2, %L2) |
| 7 | ] |
| 8 | |
| 9 | declare void @bar() |
| 10 | declare void @baz() |
| 11 | |
| 12 | |
| 13 | |
| 14 | ; Check basic jump threading for indirectbr instructions. |
| 15 | |
| 16 | ; CHECK: void @test1 |
| 17 | ; CHECK: br i1 %tobool, label %L1, label %indirectgoto |
| 18 | ; CHECK-NOT: if.else: |
| 19 | ; CHECK: L1: |
| 20 | ; CHECK: indirectbr i8* %address, [label %L1, label %L2] |
| 21 | define void @test1(i32 %i, i8* %address) nounwind { |
| 22 | entry: |
| 23 | %rem = srem i32 %i, 2 |
| 24 | %tobool = icmp ne i32 %rem, 0 |
| 25 | br i1 %tobool, label %indirectgoto, label %if.else |
| 26 | |
| 27 | if.else: ; preds = %entry |
| 28 | br label %indirectgoto |
| 29 | |
| 30 | L1: ; preds = %indirectgoto |
| 31 | call void @bar() |
| 32 | ret void |
| 33 | |
| 34 | L2: ; preds = %indirectgoto |
| 35 | call void @baz() |
| 36 | ret void |
| 37 | |
| 38 | indirectgoto: ; preds = %if.else, %entry |
| 39 | %indirect.goto.dest = phi i8* [ %address, %if.else ], [ blockaddress(@test1, %L1), %entry ] |
| 40 | indirectbr i8* %indirect.goto.dest, [label %L1, label %L2] |
| 41 | } |
| 42 | |
| 43 | |
| 44 | ; Check constant folding of indirectbr |
| 45 | |
| 46 | ; CHECK: void @test2 |
| Chris Lattner | 1a924e7 | 2011-02-18 04:43:06 +0000 | [diff] [blame] | 47 | ; CHECK: entry: |
| 48 | ; CHECK-NEXT: br label %L1 |
| 49 | ; CHECK: L1: |
| Frits van Bommel | d9df6ea | 2010-12-06 23:36:56 +0000 | [diff] [blame] | 50 | ; CHECK-NEXT: call void @bar |
| 51 | ; CHECK-NEXT: ret void |
| 52 | define void @test2() nounwind { |
| 53 | entry: |
| 54 | indirectbr i8* blockaddress(@test2, %L1), [label %L1, label %L2] |
| 55 | |
| 56 | L1: ; preds = %indirectgoto |
| 57 | call void @bar() |
| 58 | ret void |
| 59 | |
| 60 | L2: ; preds = %indirectgoto |
| 61 | call void @baz() |
| 62 | ret void |
| 63 | } |
| Chris Lattner | 1a924e7 | 2011-02-18 04:43:06 +0000 | [diff] [blame] | 64 | |
| 65 | |
| 66 | ; PR4151 |
| 67 | ; Don't merge address-taken blocks. |
| 68 | @.str = private unnamed_addr constant [4 x i8] c"%p\0A\00" |
| 69 | |
| 70 | ; CHECK: @test3 |
| 71 | ; CHECK: __here: |
| 72 | ; CHECK: blockaddress(@test3, %__here) |
| 73 | ; CHECK: __here1: |
| 74 | ; CHECK: blockaddress(@test3, %__here1) |
| 75 | ; CHECK: __here3: |
| 76 | ; CHECK: blockaddress(@test3, %__here3) |
| 77 | define void @test3() nounwind ssp noredzone { |
| 78 | entry: |
| 79 | br label %__here |
| 80 | |
| 81 | __here: ; preds = %entry |
| 82 | %call = call i32 (...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i64 0, i64 0), i64 ptrtoint (i8* blockaddress(@test3, %__here) to i64)) nounwind noredzone |
| 83 | br label %__here1 |
| 84 | |
| 85 | __here1: ; preds = %__here |
| 86 | %call2 = call i32 (...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i64 0, i64 0), i64 ptrtoint (i8* blockaddress(@test3, %__here1) to i64)) nounwind noredzone |
| 87 | br label %__here3 |
| 88 | |
| 89 | __here3: ; preds = %__here1 |
| 90 | %call4 = call i32 (...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i64 0, i64 0), i64 ptrtoint (i8* blockaddress(@test3, %__here3) to i64)) nounwind noredzone |
| 91 | ret void |
| 92 | } |
| 93 | |
| 94 | declare i32 @printf(...) noredzone |