testcase for PR1728

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42890 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/malloc3.ll b/test/Transforms/InstCombine/malloc3.ll
new file mode 100644 (file)
index 0000000..f6f412d
--- /dev/null
+++ b/test/Transforms/InstCombine/malloc3.ll
@@ -0,0 +1,26 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {malloc.*struct.foo} | count 2
+; PR1728
+
+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-f80:128:128"
+target triple = "i686-apple-darwin8"
+        %struct.foo = type { %struct.foo*, [10 x i32] }
+@.str = internal constant [21 x i8] c"tmp = %p, next = %p\0A\00"                ; <[21 x i8]*> [#uses=1]
+
+define i32 @main() {
+entry:
+        %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+        %tmp1 = malloc i8, i32 44               ; <i8*> [#uses=1]
+        %tmp12 = bitcast i8* %tmp1 to %struct.foo*              ; <%struct.foo*> [#uses=3]
+        %tmp3 = malloc i8, i32 44               ; <i8*> [#uses=1]
+        %tmp34 = bitcast i8* %tmp3 to %struct.foo*              ; <%struct.foo*> [#uses=1]
+        %tmp6 = getelementptr %struct.foo* %tmp12, i32 0, i32 0         ; <%struct.foo**> [#uses=1]
+        store %struct.foo* %tmp34, %struct.foo** %tmp6, align 4
+        %tmp8 = getelementptr %struct.foo* %tmp12, i32 0, i32 0         ; <%struct.foo**> [#uses=1]
+        %tmp9 = load %struct.foo** %tmp8, align 4               ; <%struct.foo*> [#uses=1]
+        %tmp10 = getelementptr [21 x i8]* @.str, i32 0, i32 0           ; <i8*> [#uses=1]
+        %tmp13 = call i32 (i8*, ...)* @printf( i8* %tmp10, %struct.foo* %tmp12, %struct.foo* %tmp9 )            ; <i32> [#uses=0]
+        ret i32 undef
+}
+
+declare i32 @printf(i8*, ...)
+