Reapply r52396, it was unrelated to the breakage (that was caused by r52397, my

commit after this).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52453 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 30 insertions, 9 deletions

diff --git a/test/Transforms/IPConstantProp/return-constants.ll b/test/Transforms/IPConstantProp/return-constants.ll
index 40567f80bd..7205c2820a 100644
--- a/test/Transforms/IPConstantProp/return-constants.ll
+++ b/test/Transforms/IPConstantProp/return-constants.ll
@@ -1,20 +1,41 @@
-; RUN: llvm-as < %s | opt -ipconstprop | llvm-dis | grep {add i32 21, 21}
+; RUN: llvm-as < %s | opt -ipconstprop | llvm-dis > %t
+;; Check that the 21 constants got propagated properly
+; RUN: cat %t | grep {%M = add i32 21, 21}
+;; Check that the second return values didn't get propagated
+; RUN: cat %t | grep {%N = add i32 %B, %D}
 
-define internal {i32, i32} @foo(i1 %C) {
-        br i1 %C, label %T, label %F
+define internal {i32, i32} @foo(i1 %Q) {
+        br i1 %Q, label %T, label %F
 
 T:              ; preds = %0
-        ret i32 21, i32 21
+        ret i32 21, i32 22
 
 F:              ; preds = %0
-        ret i32 21, i32 21
+        ret i32 21, i32 23
 }
 
-define i32 @caller(i1 %C) {
-        %X = call {i32, i32} @foo( i1 %C )
+define internal {i32, i32} @bar(i1 %Q) {
+        %A = insertvalue { i32, i32 } undef, i32 21, 0
+        br i1 %Q, label %T, label %F
+
+T:              ; preds = %0
+        %B = insertvalue { i32, i32 } %A, i32 22, 1
+        ret { i32, i32 } %B
+
+F:              ; preds = %0
+        %C = insertvalue { i32, i32 } %A, i32 23, 1
+        ret { i32, i32 } %C
+}
+
+define { i32, i32 } @caller(i1 %Q) {
+        %X = call {i32, i32} @foo( i1 %Q )
         %A = getresult {i32, i32} %X, 0
         %B = getresult {i32, i32} %X, 1
-        %Y = add i32 %A, %B
-        ret i32 %Y
+        %Y = call {i32, i32} @bar( i1 %Q )
+        %C = extractvalue {i32, i32} %Y, 0
+        %D = extractvalue {i32, i32} %Y, 1
+        %M = add i32 %A, %C
+        %N = add i32 %B, %D
+        ret { i32, i32 } %X
 }