Add information about why this testcase fails

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4529 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 4 deletions

diff --git a/test/Transforms/LevelRaise/2002-05-23-MissedRaise.ll b/test/Transforms/LevelRaise/2002-05-23-MissedRaise.ll
index 74d580489a..8708d86b9a 100644
--- a/test/Transforms/LevelRaise/2002-05-23-MissedRaise.ll
+++ b/test/Transforms/LevelRaise/2002-05-23-MissedRaise.ll
@@ -6,9 +6,17 @@
 %FILE = type { int, ubyte*, ubyte*, ubyte, ubyte, uint, uint, uint }
 
 uint %addfile(%FILE* %f) {
-	%cast255 = cast %FILE* %f to sbyte*		; <sbyte*> [#uses=1]
-	%reg2421 = getelementptr sbyte* %cast255, long 24		; <sbyte*> [#uses=1]
-	%reg130 = load sbyte* %reg2421		; <sbyte> [#uses=1]
-	%cast250 = cast sbyte %reg130 to uint		; <uint> [#uses=1]
+	%cast255 = cast %FILE* %f to sbyte*
+
+	; Addreses a ubyte member in memory...
+	%reg2421 = getelementptr sbyte* %cast255, long 24
+
+	; Loads the ubyte
+	%reg130 = load sbyte* %reg2421
+
+	; Error, cast cannot convert the source operand to ubyte because then
+	; the sign extension would not be performed.  Need to insert a cast.
+	;
+	%cast250 = cast sbyte %reg130 to uint  ; This is a sign extension instruction
 	ret uint %cast250
 }