Don't run a pass to strip dead prototypes; just ignore them.

Also, fix the code for supressing declarations for no-op intrinsics.

3 files changed, 43 insertions, 0 deletions

diff --git a/test/CodeGen/JS/dead-prototypes.ll b/test/CodeGen/JS/dead-prototypes.ll
new file mode 100644
index 0000000000..2a723ed61e
--- /dev/null
+++ b/test/CodeGen/JS/dead-prototypes.ll
@@ -0,0 +1,9 @@
+; RUN: llc -march=js < %s | not grep printf
+
+; llc shouldn't emit any code or bookkeeping for unused declarations.
+
+define void @foo() {
+  ret void
+}
+
+declare i32 @printf(i8* nocapture, ...)
diff --git a/test/CodeGen/JS/invariant-intrinsics.ll b/test/CodeGen/JS/invariant-intrinsics.ll
new file mode 100644
index 0000000000..dc156a9ffb
--- /dev/null
+++ b/test/CodeGen/JS/invariant-intrinsics.ll
@@ -0,0 +1,17 @@
+; RUN: llc -march=js < %s | not grep invariant
+
+; llc currently emits no code or bookkeeping for invariant intrinsic calls
+; or declarations.
+
+declare void @bar(i8*)
+
+define void @foo() {
+  %p = alloca i8
+  %i = call {}* @llvm.invariant.start(i64 1, i8* %p)
+  call void @bar(i8* %p)
+  call void @llvm.invariant.end({}* %i, i64 1, i8* %p)
+  ret void
+}
+
+declare {}* @llvm.invariant.start(i64, i8* nocapture)
+declare void @llvm.invariant.end({}*, i64, i8* nocapture)
diff --git a/test/CodeGen/JS/lifetime-intrinsics.ll b/test/CodeGen/JS/lifetime-intrinsics.ll
new file mode 100644
index 0000000000..e3d8560e30
--- /dev/null
+++ b/test/CodeGen/JS/lifetime-intrinsics.ll
@@ -0,0 +1,17 @@
+; RUN: llc -march=js < %s | not grep lifetime
+
+; llc currently emits no code or bookkeeping for lifetime intrinsic calls
+; or declarations.
+
+declare void @bar(i8*)
+
+define void @foo() {
+  %p = alloca i8
+  call void @llvm.lifetime.start(i64 1, i8* %p)
+  call void @bar(i8* %p)
+  call void @llvm.lifetime.end(i64 1, i8* %p)
+  ret void
+}
+
+declare void @llvm.lifetime.start(i64, i8* nocapture)
+declare void @llvm.lifetime.end(i64, i8* nocapture)