| Evan Cheng | c3f507f | 2011-01-29 04:46:23 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -jump-threading -S | FileCheck %s |
| Chris Lattner | 69e067f | 2008-11-27 05:07:53 +0000 | [diff] [blame] | 2 | |
| Chris Lattner | 69e067f | 2008-11-27 05:07:53 +0000 | [diff] [blame] | 3 | target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" |
| 4 | target triple = "i386-apple-darwin7" |
| 5 | |
| Chris Lattner | 5161de6 | 2012-03-13 18:07:41 +0000 | [diff] [blame^] | 6 | ; Test that we can thread through the block with the partially redundant load (%2). |
| 7 | ; rdar://6402033 |
| 8 | define i32 @test1(i32* %P) nounwind { |
| 9 | ; CHECK: @test1 |
| Chris Lattner | 69e067f | 2008-11-27 05:07:53 +0000 | [diff] [blame] | 10 | entry: |
| 11 | %0 = tail call i32 (...)* @f1() nounwind ; <i32> [#uses=1] |
| 12 | %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] |
| 13 | br i1 %1, label %bb1, label %bb |
| 14 | |
| 15 | bb: ; preds = %entry |
| Evan Cheng | c3f507f | 2011-01-29 04:46:23 +0000 | [diff] [blame] | 16 | ; CHECK: bb1.thread: |
| 17 | ; CHECK: store |
| 18 | ; CHECK: br label %bb3 |
| Chris Lattner | 69e067f | 2008-11-27 05:07:53 +0000 | [diff] [blame] | 19 | store i32 42, i32* %P, align 4 |
| 20 | br label %bb1 |
| 21 | |
| 22 | bb1: ; preds = %entry, %bb |
| 23 | %res.0 = phi i32 [ 1, %bb ], [ 0, %entry ] ; <i32> [#uses=2] |
| 24 | %2 = load i32* %P, align 4 ; <i32> [#uses=1] |
| 25 | %3 = icmp sgt i32 %2, 36 ; <i1> [#uses=1] |
| 26 | br i1 %3, label %bb3, label %bb2 |
| 27 | |
| 28 | bb2: ; preds = %bb1 |
| 29 | %4 = tail call i32 (...)* @f2() nounwind ; <i32> [#uses=0] |
| 30 | ret i32 %res.0 |
| 31 | |
| 32 | bb3: ; preds = %bb1 |
| Evan Cheng | c3f507f | 2011-01-29 04:46:23 +0000 | [diff] [blame] | 33 | ; CHECK: bb3: |
| 34 | ; CHECK: %res.01 = phi i32 [ 1, %bb1.thread ], [ 0, %bb1 ] |
| 35 | ; CHECK: ret i32 %res.01 |
| Chris Lattner | 69e067f | 2008-11-27 05:07:53 +0000 | [diff] [blame] | 36 | ret i32 %res.0 |
| 37 | } |
| 38 | |
| 39 | declare i32 @f1(...) |
| 40 | |
| 41 | declare i32 @f2(...) |
| Chris Lattner | 5161de6 | 2012-03-13 18:07:41 +0000 | [diff] [blame^] | 42 | |
| 43 | |
| 44 | ;; Check that we preserve TBAA information. |
| 45 | ; rdar://11039258 |
| 46 | |
| 47 | define i32 @test2(i32* %P) nounwind { |
| 48 | ; CHECK: @test2 |
| 49 | entry: |
| 50 | %0 = tail call i32 (...)* @f1() nounwind ; <i32> [#uses=1] |
| 51 | %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] |
| 52 | br i1 %1, label %bb1, label %bb |
| 53 | |
| 54 | bb: ; preds = %entry |
| 55 | ; CHECK: bb1.thread: |
| 56 | ; CHECK: store{{.*}}, !tbaa !0 |
| 57 | ; CHECK: br label %bb3 |
| 58 | store i32 42, i32* %P, align 4, !tbaa !0 |
| 59 | br label %bb1 |
| 60 | |
| 61 | bb1: ; preds = %entry, %bb |
| 62 | %res.0 = phi i32 [ 1, %bb ], [ 0, %entry ] |
| 63 | %2 = load i32* %P, align 4, !tbaa !0 |
| 64 | %3 = icmp sgt i32 %2, 36 |
| 65 | br i1 %3, label %bb3, label %bb2 |
| 66 | |
| 67 | bb2: ; preds = %bb1 |
| 68 | %4 = tail call i32 (...)* @f2() nounwind |
| 69 | ret i32 %res.0 |
| 70 | |
| 71 | bb3: ; preds = %bb1 |
| 72 | ; CHECK: bb3: |
| 73 | ; CHECK: %res.01 = phi i32 [ 1, %bb1.thread ], [ 0, %bb1 ] |
| 74 | ; CHECK: ret i32 %res.01 |
| 75 | ret i32 %res.0 |
| 76 | } |
| 77 | |
| 78 | !0 = metadata !{metadata !"int", metadata !1} |
| 79 | !1 = metadata !{metadata !"omnipotent char", metadata !2} |
| 80 | !2 = metadata !{metadata !"Simple C/C++ TBAA", null} |
| 81 | |