Don't combine stores to a swifterror pointer operand to a different type

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@293658 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/InstCombine/load.ll

diff --git a/test/Transforms/InstCombine/load.ll b/test/Transforms/InstCombine/load.ll
index cad2899..49ed897 100644
--- a/test/Transforms/InstCombine/load.ll
+++ b/test/Transforms/InstCombine/load.ll
@@ -219,3 +219,22 @@
   store %swift.error* %err.res, %swift.error** %err, align 8
   ret void
 }
+
+; Make sure we preseve the type of the store to a swifterror pointer.
+; CHECK-LABEL: @test19(
+; CHECK: [[A:%.*]] = alloca
+; CHECK: call
+; CHECK: [[BC:%.*]] = bitcast i8** [[A]] to
+; CHECK: [[ERRVAL:%.*]] =  load {{.*}}[[BC]]
+; CHECK: store {{.*}}[[ERRVAL]]
+; CHECK: ret
+declare void @initi8(i8**)
+define void @test19(%swift.error** swifterror %err) {
+entry:
+  %tmp = alloca i8*, align 8
+  call void @initi8(i8** %tmp)
+  %swifterror = bitcast i8** %tmp to %swift.error**
+  %err.res = load %swift.error*, %swift.error** %swifterror, align 8
+  store %swift.error* %err.res, %swift.error** %err, align 8
+  ret void
+}