1 files changed, 20 insertions, 0 deletions
diff --git a/test/CodeGen/X86/codegen-prepare-extload.ll b/test/CodeGen/X86/codegen-prepare-extload.ll
new file mode 100644
index 0000000..9f57d53
--- /dev/null
+++ b/test/CodeGen/X86/codegen-prepare-extload.ll
@@ -0,0 +1,20 @@
+; RUN: llc < %s -march=x86-64 | FileCheck %s
+; rdar://7304838
+
+; CodeGenPrepare should move the zext into the block with the load
+; so that SelectionDAG can select it with the load.
+
+; CHECK: movzbl (%rdi), %eax
+
+define void @foo(i8* %p, i32* %q) {
+entry:
+  %t = load i8* %p
+  %a = icmp slt i8 %t, 20
+  br i1 %a, label %true, label %false
+true:
+  %s = zext i8 %t to i32
+  store i32 %s, i32* %q
+  ret void
+false:
+  ret void
+}