(void)New;
DEBUG(dbgs() << " to: " << *New << "\n");
- return true;
+
+ // Lifetime intrinsics are only promotable if they cover the whole alloca.
+ // (In theory, intrinsics which partially cover an alloca could be
+ // promoted, but PromoteMemToReg doesn't handle that case.)
+ bool IsWholeAlloca = NewBeginOffset == NewAllocaBeginOffset &&
+ NewEndOffset == NewAllocaEndOffset;
+ return IsWholeAlloca;
}
bool visitPHINode(PHINode &PN) {
}
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
+
+define void @PR27999() unnamed_addr {
+; CHECK-LABEL: @PR27999(
+; CHECK: alloca [2 x i64], align 8
+; CHECK: call void @llvm.lifetime.start(i64 16,
+; CHECK: call void @llvm.lifetime.end(i64 8,
+entry-block:
+ %0 = alloca [2 x i64], align 8
+ %1 = bitcast [2 x i64]* %0 to i8*
+ call void @llvm.lifetime.start(i64 16, i8* %1)
+ %2 = getelementptr inbounds [2 x i64], [2 x i64]* %0, i32 0, i32 1
+ %3 = bitcast i64* %2 to i8*
+ call void @llvm.lifetime.end(i64 8, i8* %3)
+ ret void
+}