#include "llvm/Target/TargetData.h"
#include "llvm/Transforms/Utils/PromoteMemToReg.h"
#include "llvm/Transforms/Utils/Local.h"
+#include "llvm/Support/CallSite.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
continue;
}
+ // If this is a readonly/readnone call site, then we know it is just a load
+ // and we can ignore it.
+ if (CallSite CS = U)
+ if (CS.onlyReadsMemory())
+ continue;
+
// If this is isn't our memcpy/memmove, reject it as something we can't
// handle.
MemTransferInst *MI = dyn_cast<MemTransferInst>(U);
}
declare void @bar(i8*)
+
+
+;; Should be able to eliminate the alloca.
+define void @test3() {
+ %A = alloca %T
+ %a = bitcast %T* %A to i8*
+ call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* bitcast (%T* @G to i8*), i64 124, i32 4, i1 false)
+ call void @bar(i8* %a) readonly
+; CHECK: @test3
+; CHECK-NEXT: %a = bitcast %T* @G to i8*
+; CHECK-NEXT: call void @bar(i8* %a)
+ ret void
+}