New testcase for bug in levelraise

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1759 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 69 insertions, 0 deletions

diff --git a/test/Transforms/LevelRaise/2002-02-14-InstDelete.ll b/test/Transforms/LevelRaise/2002-02-14-InstDelete.ll
new file mode 100644
index 0000000000..ed6c07af1b
--- /dev/null
+++ b/test/Transforms/LevelRaise/2002-02-14-InstDelete.ll
@@ -0,0 +1,69 @@
+; The -raise pass is not correctly deleting instructions in all cases where it
+; should, which leaves the instruction to be deleted by DCE.  This is bad
+; because some instructions are left in an invalid form, causing an assertion
+; failure.  In this case, a chain of instructions, including a zero argument;
+; PHI node is left behind.
+;
+; RUN: as < %s | opt -raise -q
+;
+	%Hash = type { { uint, sbyte *, \2 } * *, int (uint) *, int } *
+	%HashEntry = type { uint, sbyte *, \2 } *
+	%hash = type { { uint, sbyte *, \2 } * *, int (uint) *, int }
+	%hash_entry = type { uint, sbyte *, \2 * }
+implementation
+
+void "HashDelete"(uint %key, %Hash %hash)
+begin
+bb1:					;[#uses=1]
+	%cast1006 = cast %Hash %hash to sbyte *		; <sbyte *> [#uses=1]
+	%cast1007 = cast ulong 8 to sbyte *		; <sbyte *> [#uses=1]
+	%reg1000 = add sbyte * %cast1006, %cast1007		; <sbyte *> [#uses=1]
+	%cast1008 = cast sbyte * %reg1000 to sbyte * *		; <sbyte * *> [#uses=1]
+	%reg111 = load sbyte * * %cast1008		; <sbyte *> [#uses=1]
+	%cast1009 = cast sbyte * %reg111 to uint (...) *		; <uint (...) *> [#uses=1]
+	%reg110 = call uint (...) * %cast1009( uint %key )		; <uint> [#uses=1]
+	%reg114 = shl uint %reg110, ubyte 3		; <uint> [#uses=1]
+	%cast115 = cast uint %reg114 to ulong		; <ulong> [#uses=1]
+	%cast116 = cast ulong %cast115 to sbyte *		; <sbyte *> [#uses=1]
+	%cast1010 = cast %Hash %hash to sbyte * *		; <sbyte * *> [#uses=1]
+	%reg117 = load sbyte * * %cast1010		; <sbyte *> [#uses=1]
+	%reg112 = add sbyte * %reg117, %cast116		; <sbyte *> [#uses=4]
+	%cast1011 = cast sbyte * %reg112 to sbyte * *		; <sbyte * *> [#uses=1]
+	%reg122 = load sbyte * * %cast1011		; <sbyte *> [#uses=2]
+	%cast1012 = cast ulong 0 to sbyte *		; <sbyte *> [#uses=1]
+	%cond1001 = seteq sbyte * %reg122, %cast1012		; <bool> [#uses=1]
+	br bool %cond1001, label %bb5, label %bb2
+
+bb2:					;[#uses=3]
+	%cast1013 = cast sbyte * %reg122 to uint *		; <uint *> [#uses=1]
+	%reg124 = load uint * %cast1013		; <uint> [#uses=1]
+	%cond1002 = seteq uint %reg124, %key		; <bool> [#uses=1]
+	br bool %cond1002, label %bb5, label %bb3
+
+bb3:					;[#uses=3]
+	%reg125 = phi sbyte * [ %reg126, %bb4 ], [ %reg112, %bb2 ]		; <sbyte *> [#uses=1]
+	%cast1014 = cast sbyte * %reg125 to sbyte * *		; <sbyte * *> [#uses=1]
+	%reg121 = load sbyte * * %cast1014		; <sbyte *> [#uses=2]
+	%cast1015 = cast ulong 16 to sbyte *		; <sbyte *> [#uses=1]
+	%reg126 = add sbyte * %reg121, %cast1015		; <sbyte *> [#uses=3]
+	%cast1016 = cast ulong 16 to sbyte *		; <sbyte *> [#uses=1]
+	%reg1003 = add sbyte * %reg121, %cast1016		; <sbyte *> [#uses=1]
+	%cast1017 = cast sbyte * %reg1003 to sbyte * *		; <sbyte * *> [#uses=1]
+	%reg118 = load sbyte * * %cast1017		; <sbyte *> [#uses=2]
+	%cast1018 = cast ulong 0 to sbyte *		; <sbyte *> [#uses=1]
+	%cond1004 = seteq sbyte * %reg118, %cast1018		; <bool> [#uses=1]
+	br bool %cond1004, label %bb5, label %bb4
+
+bb4:					;[#uses=3]
+	%cast1019 = cast sbyte * %reg118 to uint *		; <uint *> [#uses=1]
+	%reg120 = load uint * %cast1019		; <uint> [#uses=1]
+	%cond1005 = setne uint %reg120, %key		; <bool> [#uses=1]
+	br bool %cond1005, label %bb3, label %bb5
+
+bb5:					;[#uses=4]
+	%reg127 = phi sbyte * [ %reg126, %bb4 ], [ %reg126, %bb3 ], [ %reg112, %bb2 ], [ %reg112, %bb1 ]		; <sbyte *> [#uses=1]
+	call int (...) * %foo( sbyte * %reg127 )		; <int>:0 [#uses=0]
+	ret void
+end
+
+declare int "foo"(...)