Add new test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35664 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 19 insertions, 0 deletions

diff --git a/test/Transforms/InstCombine/2007-04-04-BadFoldBitcastIntoMalloc.ll b/test/Transforms/InstCombine/2007-04-04-BadFoldBitcastIntoMalloc.ll
new file mode 100644
index 0000000000..335f318c64
--- /dev/null
+++ b/test/Transforms/InstCombine/2007-04-04-BadFoldBitcastIntoMalloc.ll
@@ -0,0 +1,19 @@
+; In the presence of a negative offset (the -8 below), a fold of a bitcast into
+; a malloc messes up the element count, causing an extra 4GB to be allocated on
+; 64-bit targets.
+;
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep -v '= add i32'
+
+target datalayout = "e-p:64:64:64-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 = "x86_64-unknown-freebsd6.2"
+
+define i1 @test(i32 %tmp141, double** %tmp145)
+{
+  %tmp133 = add i32 %tmp141, 1
+  %tmp134 = shl i32 %tmp133, 3
+  %tmp135 = add i32 %tmp134, -8
+  %tmp136 = malloc i8, i32 %tmp135
+  %tmp137 = bitcast i8* %tmp136 to double*
+  store double* %tmp137, double** %tmp145
+  ret i1 false
+}