Conservative fix for PR17827 - don't optimize a shift + and + compare sequence where...

[oota-llvm.git] / test / Transforms / JumpThreading / thread-loads.ll

diff --git a/test/Transforms/JumpThreading/thread-loads.ll b/test/Transforms/JumpThreading/thread-loads.ll
index cce23ea319c86b316a15bae8f98e5c59129e58c3..e5bf64b9e256361c6e8b0c98c708317fe747b1d1 100644 (file)
--- a/test/Transforms/JumpThreading/thread-loads.ll
+++ b/test/Transforms/JumpThreading/thread-loads.ll
@@ -1,12 +1,12 @@
 ; RUN: opt < %s -jump-threading -S | FileCheck %s
-; rdar://6402033
 
-; Test that we can thread through the block with the partially redundant load (%2).
 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"
 target triple = "i386-apple-darwin7"
 
-define i32 @foo(i32* %P) nounwind {
-; CHECK: foo
+; Test that we can thread through the block with the partially redundant load (%2).
+; rdar://6402033
+define i32 @test1(i32* %P) nounwind {
+; CHECK-LABEL: @test1(
 entry:
        %0 = tail call i32 (...)* @f1() nounwind                ; <i32> [#uses=1]
        %1 = icmp eq i32 %0, 0          ; <i1> [#uses=1]
@@ -39,3 +39,43 @@ bb3:         ; preds = %bb1
 declare i32 @f1(...)
 
 declare i32 @f2(...)
+
+
+;; Check that we preserve TBAA information.
+; rdar://11039258
+
+define i32 @test2(i32* %P) nounwind {
+; CHECK-LABEL: @test2(
+entry:
+       %0 = tail call i32 (...)* @f1() nounwind                ; <i32> [#uses=1]
+       %1 = icmp eq i32 %0, 0          ; <i1> [#uses=1]
+       br i1 %1, label %bb1, label %bb
+
+bb:            ; preds = %entry
+; CHECK: bb1.thread:
+; CHECK: store{{.*}}, !tbaa !0
+; CHECK: br label %bb3
+       store i32 42, i32* %P, align 4, !tbaa !0
+       br label %bb1
+
+bb1:           ; preds = %entry, %bb
+       %res.0 = phi i32 [ 1, %bb ], [ 0, %entry ]
+       %2 = load i32* %P, align 4, !tbaa !0
+       %3 = icmp sgt i32 %2, 36
+       br i1 %3, label %bb3, label %bb2
+
+bb2:           ; preds = %bb1
+       %4 = tail call i32 (...)* @f2() nounwind
+       ret i32 %res.0
+
+bb3:           ; preds = %bb1
+; CHECK: bb3:
+; CHECK: %res.01 = phi i32 [ 1, %bb1.thread ], [ 0, %bb1 ]
+; CHECK: ret i32 %res.01
+       ret i32 %res.0
+}
+
+!0 = metadata !{metadata !3, metadata !3, i64 0}
+!1 = metadata !{metadata !"omnipotent char", metadata !2}
+!2 = metadata !{metadata !"Simple C/C++ TBAA", null}
+!3 = metadata !{metadata !"int", metadata !1}