Vendor import of llvm trunk r126079:

http://llvm.org/svn/llvm-project/llvm/trunk@126079

1 files changed, 29 insertions, 0 deletions

diff --git a/test/Transforms/CodeGenPrepare/basic.ll b/test/Transforms/CodeGenPrepare/basic.ll
new file mode 100644
index 0000000..3b1fca3
--- /dev/null
+++ b/test/Transforms/CodeGenPrepare/basic.ll
@@ -0,0 +1,29 @@
+; RUN: opt -codegenprepare %s -S -o - | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+target triple = "x86_64-apple-darwin10.0.0"
+
+; CHECK: @test1
+; objectsize should fold to a constant, which causes the branch to fold to an
+; uncond branch.
+; rdar://8785296
+define i32 @test1(i8* %ptr) nounwind ssp noredzone align 2 {
+entry:
+  %0 = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false)
+  %1 = icmp ugt i64 %0, 3
+  br i1 %1, label %T, label %trap
+
+; CHECK: entry:
+; HECK-NEXT: ret i32 4
+
+trap:                                             ; preds = %0, %entry
+  tail call void @llvm.trap() noreturn nounwind
+  unreachable
+
+T:
+  ret i32 4
+}
+
+declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readonly
+
+declare void @llvm.trap() nounwind