Add information about why this testcase fails

[oota-llvm.git] / test / Transforms / LevelRaise / 2002-05-23-MissedRaise.ll

diff --git a/test/Transforms/LevelRaise/2002-05-23-MissedRaise.ll b/test/Transforms/LevelRaise/2002-05-23-MissedRaise.ll
index 74d580489ab2064d7c3350ce6be224e72f5c8d36..8708d86b9ace48fc1baac2ad550934cd1c80f804 100644 (file)
--- 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
 }