1 files changed, 91 insertions, 0 deletions
diff --git a/test/Transforms/MergeFunc/merge-block-address.ll b/test/Transforms/MergeFunc/merge-block-address.ll
new file mode 100644
index 000000000000..4ce13e5da874
--- /dev/null
+++ b/test/Transforms/MergeFunc/merge-block-address.ll
@@ -0,0 +1,91 @@
+; RUN: opt -S -mergefunc < %s | FileCheck %s
+
+; These two functions are identical. The basic block labels are the same, and
+; induce the same CFG. We are testing that block addresses within different
+; functions are compared by their value, and not based on order. Both functions
+; come from the same C-code, but in the first the two val_0/val_1 basic blocks
+; are in a different order (they were manually switched post-compilation).
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define i32 @_Z1fi(i32 %i) #0 {
+entry:
+  %i.addr = alloca i32, align 4
+  %ret = alloca i32, align 4
+  %l = alloca i8*, align 8
+  store i32 %i, i32* %i.addr, align 4
+  store i32 0, i32* %ret, align 4
+  store i8* blockaddress(@_Z1fi, %val_0), i8** %l, align 8
+  %0 = load i32, i32* %i.addr, align 4
+  %and = and i32 %0, 256
+  %cmp = icmp eq i32 %and, 0
+  br i1 %cmp, label %if.then, label %if.end
+
+if.then:
+  store i8* blockaddress(@_Z1fi, %val_1), i8** %l, align 8
+  br label %if.end
+
+if.end:
+  %1 = load i8*, i8** %l, align 8
+  br label %indirectgoto
+
+val_1:
+  store i32 42, i32* %ret, align 4
+  br label %end
+
+val_0:
+  store i32 12, i32* %ret, align 4
+  br label %end
+
+
+end:
+  %2 = load i32, i32* %ret, align 4
+  ret i32 %2
+
+indirectgoto:
+  %indirect.goto.dest = phi i8* [ %1, %if.end ]
+  indirectbr i8* %indirect.goto.dest, [label %val_0, label %val_1]
+}
+
+define i32 @_Z1gi(i32 %i) #0 {
+; CHECK-LABEL: define i32 @_Z1gi
+; CHECK-NEXT: tail call i32 @_Z1fi
+; CHECK-NEXT: ret
+entry:
+  %i.addr = alloca i32, align 4
+  %ret = alloca i32, align 4
+  %l = alloca i8*, align 8
+  store i32 %i, i32* %i.addr, align 4
+  store i32 0, i32* %ret, align 4
+  store i8* blockaddress(@_Z1gi, %val_0), i8** %l, align 8
+  %0 = load i32, i32* %i.addr, align 4
+  %and = and i32 %0, 256
+  %cmp = icmp eq i32 %and, 0
+  br i1 %cmp, label %if.then, label %if.end
+
+if.then:
+  store i8* blockaddress(@_Z1gi, %val_1), i8** %l, align 8
+  br label %if.end
+
+if.end:
+  %1 = load i8*, i8** %l, align 8
+  br label %indirectgoto
+
+val_0:
+  store i32 12, i32* %ret, align 4
+  br label %end
+
+val_1:
+  store i32 42, i32* %ret, align 4
+  br label %end
+
+end:
+  %2 = load i32, i32* %ret, align 4
+  ret i32 %2
+
+indirectgoto:
+  %indirect.goto.dest = phi i8* [ %1, %if.end ]
+  indirectbr i8* %indirect.goto.dest, [label %val_0, label %val_1]
+}
+