inalloca: Don't remove dead arguments in the presence of inalloca args

[oota-llvm.git] / test / Transforms / DeadArgElim / keepalive.ll

diff --git a/test/Transforms/DeadArgElim/keepalive.ll b/test/Transforms/DeadArgElim/keepalive.ll
index 82e01f225843a0330910a2f752128c30b860f032..b66df792ca84d4e2bb39a5d80ea8cd7c3b535ee1 100644 (file)
--- a/test/Transforms/DeadArgElim/keepalive.ll
+++ b/test/Transforms/DeadArgElim/keepalive.ll
@@ -28,4 +28,20 @@ define void @caller() {
         ret void
 }
 
+; We can't remove 'this' here, as that would put argmem in ecx instead of
+; memory.
+define internal x86_thiscallcc i32 @unused_this(i32* %this, i32* inalloca %argmem) {
+       %v = load i32* %argmem
+       ret i32 %v
+}
+; CHECK-LABEL: define internal x86_thiscallcc i32 @unused_this(i32* %this, i32* inalloca %argmem)
+
+define i32 @caller2() {
+       %t = alloca i32
+       %m = alloca i32, inalloca
+       store i32 42, i32* %m
+       %v = call x86_thiscallcc i32 @unused_this(i32* %t, i32* inalloca %m)
+       ret i32 %v
+}
+
 ; CHECK: attributes #0 = { nounwind }