fix bug with using an implicit label in a phi more than once

1 files changed, 30 insertions, 0 deletions

diff --git a/tests/cases/phientryimplicitmix.ll b/tests/cases/phientryimplicitmix.ll
new file mode 100644
index 00000000..9223c059
--- /dev/null
+++ b/tests/cases/phientryimplicitmix.ll
@@ -0,0 +1,30 @@
+; ModuleID = 'tests/hello_world.bc'
+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-f80:32:32-n8:16:32-S128"
+target triple = "i386-pc-linux-gnu"
+
+; Phi nodes can refer to the entry. And the entry might be unnamed, and doesn't even have a consistent implicit name!
+
+@.str = private unnamed_addr constant [15 x i8] c"hello, world!\0A\00", align 1 ; [#uses=1 type=[15 x i8]*]
+
+; [#uses=0]
+define i32 @main() {
+  %retval = alloca i32, align 4                   ; [#uses=1 type=i32*]
+  %16 = trunc i32 1 to i1
+  br i1 %16, label %whoosh, label %26, !dbg !1269853  ; [debug line = 3920:5]
+
+whoosh: ; preds = %1
+  %25 = trunc i32 1 to i1
+  br label %26
+
+; <label>:26                                      ; preds = %17, %1
+  %27 = phi i1 [ false, %1 ], [ %25, %whoosh ]        ; [#uses=1 type=i1]
+  %28 = phi i1 [ true, %1 ], [ %25, %whoosh ]        ; [#uses=1 type=i1]
+  store i32 0, i32* %retval
+  %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([15 x i8]* @.str, i32 0, i32 0)) ; [#uses=0 type=i32]
+  %cal2 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([15 x i8]* @.str, i32 0, i32 0), i32 %27) ; make sure %27 is used
+  %cal3 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([15 x i8]* @.str, i32 0, i32 0), i32 %28) ; make sure %28 is used
+  ret i32 1
+}
+
+; [#uses=1]
+declare i32 @printf(i8*, ...)