Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/test/Transforms/InstCombine/2008-01-06-BitCastAttributes.ll

@@ -0,0 +1,30 @@
+; Ignore stderr, we expect warnings there
+; RUN: opt < %s -instcombine 2> /dev/null -S | FileCheck %s
+
+; CHECK-NOT: bitcast
+
+define void @a() {
+  ret void
+}
+
+define signext i32 @b(i32* inreg  %x)   {
+  ret i32 0
+}
+
+define void @c(...) {
+  ret void
+}
+
+define void @g(i32* %y) {
+; CHECK-LABEL: @g(
+; CHECK: call i64 bitcast (i32 (i32*)* @b to i64 (i32)*)(i32 0)
+	%x = call i64 bitcast (i32 (i32*)* @b to i64 (i32)*)( i32 0 )		; <i64> [#uses=0]
+
+; The rest should not have bitcasts remaining
+; CHECK-NOT: bitcast
+  call void bitcast (void ()* @a to void (i32*)*)( i32* noalias  %y )
+  call <2 x i32> bitcast (i32 (i32*)* @b to <2 x i32> (i32*)*)( i32* inreg  null )		; <<2 x i32>>:1 [#uses=0]
+  call void bitcast (void (...)* @c to void (i32)*)( i32 0 )
+  call void bitcast (void (...)* @c to void (i32)*)( i32 zeroext  0 )
+  ret void
+}