new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36520 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/bitcast-gep.ll b/test/Transforms/InstCombine/bitcast-gep.ll
new file mode 100644 (file)
index 0000000..5a514ab
--- /dev/null
+++ b/test/Transforms/InstCombine/bitcast-gep.ll
@@ -0,0 +1,19 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep bitcast
+; RUN: llvm-as < %s | opt -instcombine -scalarrepl | llvm-dis | grep {ret i8. %v}
+; PR1345
+
+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"
+target triple = "powerpc-apple-darwin8.8.0"
+
+define i8* @test(i8* %v) {
+       %A = alloca [4 x i8*], align 16         ; <[4 x i8*]*> [#uses=3]
+       %B = getelementptr [4 x i8*]* %A, i32 0, i32 0          ; <i8**> [#uses=1]
+       store i8* null, i8** %B
+       %C = bitcast [4 x i8*]* %A to { [16 x i8] }*            ; <{ [16 x i8] }*> [#uses=1]
+       %D = getelementptr { [16 x i8] }* %C, i32 0, i32 0, i32 8               ; <i8*> [#uses=1]
+       %E = bitcast i8* %D to i8**             ; <i8**> [#uses=1]
+       store i8* %v, i8** %E
+       %F = getelementptr [4 x i8*]* %A, i32 0, i32 2          ; <i8**> [#uses=1]
+       %G = load i8** %F               ; <i8*> [#uses=1]
+       ret i8* %G
+}