diff options
Diffstat (limited to 'test/Transforms/JumpThreading/thread-loads.ll')
| -rw-r--r-- | test/Transforms/JumpThreading/thread-loads.ll | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/test/Transforms/JumpThreading/thread-loads.ll b/test/Transforms/JumpThreading/thread-loads.ll new file mode 100644 index 0000000..96ba701 --- /dev/null +++ b/test/Transforms/JumpThreading/thread-loads.ll @@ -0,0 +1,34 @@ +; RUN: opt < %s -jump-threading -simplifycfg -S | grep {ret i32 1} +; 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 { +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 + store i32 42, i32* %P, align 4 + br label %bb1 + +bb1: ; preds = %entry, %bb + %res.0 = phi i32 [ 1, %bb ], [ 0, %entry ] ; <i32> [#uses=2] + %2 = load i32* %P, align 4 ; <i32> [#uses=1] + %3 = icmp sgt i32 %2, 36 ; <i1> [#uses=1] + br i1 %3, label %bb3, label %bb2 + +bb2: ; preds = %bb1 + %4 = tail call i32 (...)* @f2() nounwind ; <i32> [#uses=0] + ret i32 %res.0 + +bb3: ; preds = %bb1 + ret i32 %res.0 +} + +declare i32 @f1(...) + +declare i32 @f2(...) |