Fix the third (and last known) case of code update problems due

to LLVM IR changes with addr label weirdness.  In the testcase, we
generate references to the two bb's when codegen'ing the first
function:

_test1:                                 ## @test1
	leaq	Ltmp0(%rip), %rax
..
	leaq	Ltmp1(%rip), %rax

Then continue to codegen the second function where the blocks
get merged.  We're now smart enough to emit both labels, producing
this code:

_test_fun:                              ## @test_fun
## BB#0:                                ## %entry
Ltmp1:                                  ## Block address taken
Ltmp0:
## BB#1:                                ## %ret
	movl	$-1, %eax
	ret

Rejoice.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98595 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 19 insertions, 0 deletions

diff --git a/test/CodeGen/Generic/addr-label.ll b/test/CodeGen/Generic/addr-label.ll
index 49f3cbfe7c..51741110e0 100644
--- a/test/CodeGen/Generic/addr-label.ll
+++ b/test/CodeGen/Generic/addr-label.ll
@@ -37,3 +37,22 @@ test_label:
 ret:
         ret i32 -1
 }
+
+; Issues with a BB that gets RAUW'd to another one after references are
+; generated.
+define void @test3(i8** %P, i8** %Q) nounwind {
+entry:
+  store i8* blockaddress(@test3b, %test_label), i8** %P
+  store i8* blockaddress(@test3b, %ret), i8** %Q
+  ret void
+}
+
+define i32 @test3b() nounwind {
+entry:
+	br label %test_label
+test_label:
+	br label %ret
+ret:
+	ret i32 -1
+}
+